SUBJECT INDEXINDUSTRIAL AND ENGINEERING CHEMISTRY

ANALYTICAL E D ITIO N VOLUME 2 - 1 9 3 0

A B R A SIO N Test, Development of— for Use with NitrocelluloseLacquers. Lacquer Studies— I. William K och ................................... 407

Acetyl and Nitrogen Content of Cellulose Nitroacetate, Determinationof. W. M. Billing and J. S. Tinsley......................................................... 380

A c i d :Determination of Small Amounts o f— in Ether. L. P. H all............. 244Null-Poiut Method of Potentiomctric Titration for Determining—

or Alkali in Paper. B. L. Clarke and L. A. W ooten........................ 385Numbers of Dark-Colored Resins. II. H. Coburn.............................. 181Organic, Determination of— in Mixtures. I— Determination of

Fatty Acids in Mixtures by Partition between Isopropyl Etherand Water. C. H. W crkman.................................................................. 302

Volatile W ood, Estimation o f— Corrosive to Lead Cable Sheath.R. M . Burns and B. L. Clarke................................................................. 86

Acriflavine, Colorimetric Determination o f—and Neutral— . E. L.Howes.................................................................................................................. 114

A i r :High-Scnsitivity Absolute-Humidity Recorder. C. Z. Rosecrans. . 129Industrial Analysis and Recording of Carbon Dioxide and Oxygen

in. W . F. Hamilton. .......................................................................... 233Modified Petcrson-Palmquist Apparatus for Determination of Car­

bon Dioxide in. E. P. Jones.................................................................. 195Preparation of— of Known Humidity and Its Application to Cali­

bration o f Absolute-Humidity Recorder. A. C. Walker and E.J. Ernst, Jr. . . . ........................................................................................... 134

Alcohol, Determination of— by Pycnometer. A. F. Fuerst.................... 30Alcohol Developments in Finland................................................................... 425Aldose. See Sugars.Alkali, Method for Estimating Aldose Sugars by Titration with Iodine

and. C. S. Slater and S. F. Acree........................................................... 274Modified Method. G. M . Kline and S. F. Acree.................................. 413

Alkali, Null-Point Method of Potentiometric Titration for DeterminingAcid or— in Paper. B. L. Clarke and L. A. W ooten............................ 385

A l l o y s :Application o f Microscopic Analysis to Mixtures of Metals and.

W . F. Whitmore and Frank Schneider.................................................. 173Determination o f Cobalt in Driers, Japans, and. Oscar Heim 38High-Melting, Determination of Carbon in— Using High-Frequency

Induction Furnace. G. F. Smith and G. L. H ockcnyos................. 36Lead-Antimony, Determination o f Antimony in— of Low Antimony

Content. L. I. Shaw, C. F. Whittemore, and T . H. W estby 402Lead, Rapid Method for Determining Calcium in—of Low Calcium

Content. L. I. Shaw, C. F. Whittemore, and T . H. W estby 401Magnesium-Aluminum, Short Method for Complete Analysis of.

S. S. Singer ................... .̂.......................... . ................................. 288Zinc-Base Die-Casting, Determination o f Aluminum and Magnesium

in. C. M . Craighead.................................................................................. 188Alumina in New Form as Laboratory Dcsiccant. J. B. Barnitt, R . B.

Derr, and E. W . Scripture, Jr....................................................................... 355A l u m i n u m :

Boiling Milk in— Does N ot Destroy Vitamin C ..................................... 224Determination o f— and Magnesium in Zinc-Base Die-Casting

Alloys. C. M . Craighead......................................................................... 188Determination of Beryllium in. H. V. Churchill, R . W. Bridges,

and M . F. Lee............................................................................................... 405Hot Plate and Dutch Oven. H. V. Churchill and R . W . Bridges.. . 335Identification o f— and Magnesium in Printing Inks. L. M . Larsen. 416Magnesium—Alloys. See Alloys.

American Oil Chemists' Society, Study o f Official Method of BleachingTest of. Chieh M a and J. B. W ithrow.................................................... 374

Ammonia, Aqua, Special Hydrometer for. D . F. Farrar........................ 293A n a l y s i s :

Quantitative— by Monochromatic Transmission. Monroe Barnardand Paul M cM ichael................................................................................... 363

Quantitative, Effect o f Degree o f Pulverization and Weight of Samples on. W ith Particular Reference to Plant Tissues. R. C.M alhotra ; . ......................................................................................... 398

Volumetric, Providing for Changes of Temperature in. M . G.M ellon............................................................................................................. 260

A n a l y t i c a l C h e m i s t r y , S y m p o s i u m o n :Applications of Photo-Electric Cell to Chemical Analysis and

Control. H. M . Partridge....................................................................... 207Conductometric Titrations. I. M . Kolthoff........................................... 225Electrode Potentials in Analytical Chemistry. Stephen P opoff. . . . 230Microscopical Methods in Analytical Chemistry. C. W. Mason. . . 203Modern Trends in Analytical Chemistry- II. H. W illard.................. 201Potentiometric Titrations. N. H. Furman............................................. 213

Antimony, Determination of. Evaluation of Stibnite— II. W . M .M cNabb and E. C. Wagner.......................................................................... 251

Antimony, Determination o f— in Lead— Alloys o f Low — Content.L. I. Shaw, C. F. Whittemore, and T . H. W estby................................... 402

Apples, Sampling of— for Arsenical Spray Residue Determinations.J. R. N eller....................................................................................................... 382

Arsenic, Accuracy of Gutzeit M ethod for Determination of MinuteQuantities of. J. W. Barnes and C. W . M urray................................... 29

Asbestos, Preparation of— for Use as Filter Aid. Color in Sugar Industry— III. J. F. Brewster and F. P. Phelps................................. 373

B A R IU M Oxide as Dcsiccant. H. S. Booth and L. H. M cIn ty re .. . . 12Barium Sulfate, Estimation of Sulfates as. M icroscopic Examination

of Precipitates as Aid to Precise Analysis. Stephen Popoff and E. W. Neum an.................................................................................................. 45

Barium Sulfate, Use of— for Clarifying Soil Suspensions, with Particular Reference to Colorimetric pH Determinations. L. D. Baver andC. J. Rchling.................................................................................................... 338

B a r o - B u r e t :New Accurate Gas Buret. H. S. B ooth .................................................. 182II— Application to Gas Evolution Methods of Analysis. H. S.

Booth and N. C. Jones............................................................................... 237Bath, Constant-Temperature, Large-Capacity— Containing R e­

movable Glass Front. T . H. Tremearne............................................... 426Beryllium, Determination o f—in Aluminum. H. V. Churchill, R . W.

Bridges, and M. F. Lee................................................................................. 405Biological Material^ Application of Burgess-Parr Sulfur Photometer

to Rapid Determination o f Sulfur in Foods and. E. W. Toepferand P. W. Bout well......................................................................................... 118

Bituminous Materials, Substitute for Amalgamation in Testing— forMelting Point, Ductility, and Float Test. Hans Eisner..................... 176

Bleaching Test, Official Method of American Oil Chemists' Society.Chieh Ma and J. B. W ithrow....................................................................... 374

Boric Acid, Use of Carob-Seed Gum for Detection and Estimation of—and Borates. Ralph H art............................................................................ 329

Boron, Determination o f—in Natural Waters and Plant Materials.Modification of Chapin Method. L. V. W ilcox..................................... 358

Buret, Baro. See Baro-Buret.Buret, Weight, Improved. H. B. Friedman and V. K . LaM er............. 54

C A B LE Sheath, Lead, Estimation of Volatile W ood Acids Corrosiveto. R. M . Burns and B. L. Clarke.......................................................... 86

Calcium, Determination of— and Magnesium in Dolomitic Limestones by Means of Saccharate Solutions. Alkalimetric Method. A. C.Shead and B. J. Heinrich.............................................................................. 388

Calcium, Rapid Method for Determining— in Lead Alloys of Low—Content. L. I. Shaw, F. W. Whittemore, and T . H. W estby 401

Calorimeter Bombs, Comparison of Fused Silica, Gold, and PlatinumLinings for. O. K . Bates.............................................................................. 162

C a r b o n :Blacks, Moisture Content of. W. B. Plummer..................................... 57Determination of— in High-Melting Alloys Using High-Frequency

Induction Furnace. G. F. Smith and G. L. Hockenyos.................. 36Hydrogen, and Nitrogen Determinations Using Metal Tube. S.

Avery and D. Hay man.............................................................................. 336C a r b o n D i o x i d e :

Determination of— in Carbonates. W. W . Scott and P. W. Jewel. . 76C. A. Jacobson and J. W. Haught......................................................... 334

Generator for Combustion Analysis in Estimation of Nitrogen.E. J. Poth ................................... 250

Industrial Analysis and Recording of— and Oxygen in Air. W. F.Hamilton........................................................................................................ 233

Modified Peterson-Palmquist Apparatus for Determination of— inAir. E. P. Jones......................................................................................... 195

Carbonates, Determination of Carbon Dioxide in. W . W . Scott andP. W. Jewel................................................................................................... 76

C. A. Jacobson and J. W . H aught.............................................................. 334Carbon Disulfide Extraction, Determination of Sulfur in Insecticides

and Fungicides by. Richard Edge............................................................ 371Carius Combustions, Subsequent Additions of Acid in. D. D.

H artley............................................................................................................... 328Carob-Seed Gum. See Gum.Cell, Bartell-Osterhof, Improved. C. C. DeW itt....................................... 424Cell, Electrolytic, for Use with Mercury Cathode. A. D. Melaven.. . 180Cellulose Nitroacetate, Determination of Nitrogen and Acetyl Content

of. W . M . Billing and J. S. Tinsley........................................................ 380C e m e n t :

For Silica-Glass Joints. C. G. M aier ; ........................................... 337Portland, Revised Procedure for Determination of Uncombined

Lime in. William Lerch and R . H . Bogne......................................... 296Thick Rubber, Application o f Falling Cylinder to Measurement of

Viscosity of. W . F. Busse and W. B. Doggett................................... 314Centralite, Determination o f— in Double-Base Smokeless Powders.

PI. Levenson........................................................................ ..................... .. 246Chain, Platinum-Wire, Construction of— for Foulk—-Hydrometer. W.

W . Koch and G. F. Smith............................................................................. 41Chemicals, Analytical Reagent, Recommended Specifications for.

A. C. S. Committee on Analytical Reagents, W . D. Collins, Chair­m an...................................................................................................................... 351

Chestnut Trees Retain Tannin Long after Death....................................... 62Chlorides, Determination of— in Salt Brines. S. L. N eave.................... 28Cholesterol as Measure o f Egg Yolk in M ilk Products. L. M . Lam-

p e rt ........................ ............................................................................................. 159Chromium, Determination of— and Vanadium after Oxidation with

Potassium Bromate. I. M . Kolthoff and E. B. Sandell....................... 140Chromium, Perchloric Acid as Oxidizing Agent in Determination of.

J. J. L ichtin....................................................................................................... 126Coal Ash, Observations of M icro-Pyrometer and Gas-Furnace Methods

for Determination of Fusion Point of. M . C. K . Jones, HaroldFarmer, J. E. Brewer, and H. C. Porter.................................................... 325

Coal, Effect o f Illium Crucibles on Determination of Volatile Matterin. F. A. Addlestone..................................................................................... 422

Cobalt, Determination o f— in Driers, Japans, and Alloys. OscarHeim *........................................................................................................ 38

Cobalt, Separation of— and Nickel by Means of Hypochlorite. F.H. Rhodes and H. J. Hosking...................................................................... 164

Colloids, Protective, Use of— in Colorimetric Determination of Certain Metals as Lakes of Dyes. W. E. T hrun.................................................. 8

432 AN ALYTICAL EDITION Vol. 2, No. 4

Color Comparison, Qualitative, Rapid M ethod for— of Opaque Solids.J. J[. Shank and J. S. Martin.................................................................. 343

Colorimeter, Multiple Standard— for pH Determinations. S. L.LeibofI......................................................... : ..................................................... 194

Color in Sugar Industry. I l l — Preparation of Asbestos for Use asFilter Aid. J. F. Brewster and F. P. Phelps................................... 373

Condenser, Improved Laboratory—and Use in Construction of Ap­paratus. E. S. W est......................... 199

CoNDUCTOMETRIC DETERMINATIONS: ’ -Ash and Electrical Conductivity of Sirups and Molasses Derived

from Sugar Cane. F. W. Zerban and Louis Sattler........................ 32Of Ash in Refinery Sirups. F. W. Zerban and Louis Sattler............. 322Of Moisture Content of Wood. A. J. Stamm........................................ 240Symposium on Analytical Chemistry. I. M. Kolthoff.................. 225

Copper, Use of Tantalum as Cathode for Electrodeposition of. B.Mears and P. R . Pine................................................................................. . . 298

Corrosion. Estimation of Volatile W ood Acids Corrosive to LeadCable Sheath. R. M. Burns and B. L. Clarke............................... 86

Cresols, Quantitative Separation of Phenol from—and Higher Phenols.J. N. Miller and O. M. Urbain................................................................... 123

Crucibles, I Ilium, Effect o f—on Volatile Determination in Coal. J. A.Addlestone.............................. 422

Cupric Oxide as Standard in Iodimetry. T. F. Buehrcr and C. M . Mason. (Correspondence) ....................... 138

D E N SITY , Device for Rapid Estimation o f— of Small Amounts ofSolids. E. R. C alcy........................................................................................ 177

D k s i c c a n t :Barium Oxide as. II. S. Booth and L. H. M cIntyre............................ 12Laboratory, Alumina in New Form as. J. B. Barnitt, R. B. Derr,

and E. W. Scripture, Jr............................................................................. 355Magnesium Perchlorate, Anhydrous, as. Sam Lcnhcr and G. B.

T aylor............................................................................................................. 58Dextrose. Determination o f—in Presence of Levulose. D. T . Englis

and W. J. Byer................................................................................................. 121Dextrose, Effect o f— and Sucrose on Determination of Levulose by

Nijns' Method. F. W. Zerban and Louis Sattler................................. 307Dialkyldiphenylureas (Ccntralite), Determination o f— in Double-Base

Smokeless Powders. H. Levenson............................................................. 246Diastase, Malt, Determination of Liquefying Power of. S. J6zsa and

H. C. Gore......................................................................................................... 26Diastase, Malt. Determination of Relative Diastatic Powers of

Malt. F. C. Silbernagcl................................................................................ 31D i s t i l l a t i o n :

Construction and Use of Raschig’s Laboratory Fractionating Column. H. M . Evans, R . E. Cornish, S. Lepkovsky, R. C.Archibald, and G. Feskov.............. 339

Convenient Reflux Regulator for Laboratory Stills. J. H. Bruun. . 187General Laboratory Still. Gilbert Pitman.............................................. 418Improved Laboratory Condenser and Use in Construction of Ap­

paratus. E. S. W est.................................................................................. 199True Boiling Crude Analysis. G. A. Beiswengcr and W. C. Child. . 284

Drier, Rapid Bulk-Sample. T . H. Hopper................................................. 198Driers, Japans, and Alloys, Determination of Cobalt in. Oscar

Heim.................................................................................................................... 38Drying Agents. See Desiccants.Dyes, Use of Protective Colloids in Colorimetric Determination of

Certain Metals as Lakes of. W. E. Thrun.............................................. 8

EGG Yolk, Cholesterol as Measure o f— in Milk Products. L. M.Lampert.......................................................... 159

Electrode Potentials in Analytical Chemistry. Symposium on Ana­lytical Chemistry. Stephen Popoff............................................................ 230

Electrode. Quinhydrone, Determination of Acidity of Oils and Fats b y —in Nou-Aqueous Solutions. Harry Seitz and Louis Silverman. 1

Emulsions, Oil-Water-Soap, Direct Determination of Oil in. L. N.M arkwood.......................................................................................................... 265

Enamels. See Paints.Ether, Determination of Small Amounts of Acid in. L. P. H all 244Ether, Isopropyl, Determination of Fatty Acids in Mixtures by Parti­

tion between— and Water. Determination of Organic Acids in Mixtures— I. C. II. Werkman................................................................... 302

FABRICS, Estimation of Degree of Penetration of Rubber into. E.O. Dieterich ............................................................................................. 102

F a t :Micropenetrometcr. Application to Testing of. E. Freyer................ 423Total, Rapid Determination of. C. P. Harris....................................... 410See also Oil.

Fertilizers, Nitrogenous, Italian Production o f ......................................... 44Flax as Paper-Making Material..................................... ................................ 419Fluorine, Spectroscopic Detection of. Jacob Papish, L. E. Hoag,

and W. E. Snee....................... ............ ; ............................... 263Foods, Apparatus for Destructive Oxidation of Organic Material in

Determination of Metals in. J. W. Barnes............................................. 107Foods, Application of Burgess-Parr Sulfur Photometer to Rapid De­

termination of Sulfur in— and Biological Material. E. W. Toepferand P. W. Bout well. .................................................................................... 118

Fractionating Column, Raschig’s Laboratory, Construction and Use.H. M. Evans, R. E. Cornish, S. Lepkovsky, R. C. Archibald, andG. Feskov........................................................................................................ 339

Fumigants, Insect, Measuring Toxicity of. A. L. Strand....................... 4Fungicides. See Insecticides.Furnace, High-Frequency Induction, Determination of Carbon in

High-Melting Alloys Using. G. F. Smith and G. L. H ockenyos.. . 36Fusel Oil and Methanol, Denmark Changes Duties o n .................. 345Fusion, Sodium Peroxide as— Medium with Some New Factors Re­

lating to Its Use. S. W . Parr..................................................................... 10

G A S:Evolution Methods of Analysis. Baro-Buret— II. H. S. Booth

and N. C. Jones........................................................................................... 237Natural, Blast Lamp for. H. H. Strain.................................................. 128Natural, Califbrnia to Utilize Surplus........................................................ 200Problems iu Estimation of Unsaturated Hydrocarbons in. H ~

Some Limitations in Separations by Sulfuric Acid. H. S. Davisand Dorothy Quiggle.................................................................................. 39

Gasoline, Determination of Sulfur in. Graham Edgar and GeorgeCalingaert......................................................................................... 104

Gelatin, Determination of Labile Sulfur in— and Protein. S. E.Sheppard and J. H. Hudson......................................................................... 73

Glass-Silica Joints, Cement for. C. G. M aier............................................ 337Glossmeter, Pfund, Applied to Paints and Lacquers. G. S. Haslam

and L. D. Grady, Jr......................................................................................... 346Glue, Standard Methods (Revised) for Determining Viscosity and

Jelly Strength of Glue. National Association of Glue Manufac­turers.................................................................................................................... 348

Gum, Carob-Seed. Use in Detection and Estimation of Boric Acid andBorates. Ralph H art..................................................................................... 329

Gums and Resins, Photographic Estimation o f Foreign Materials in.E. A. Georgi........................... ........................................................................... 331

Gutzeit M ethod. See Arsenic.

H ALOGEN , Separation of Alkyl and Aryl. Modification o f Stepa- now Method with Particular Reference to Analysis o f Certain In­secticides. Quick Landis and H. J. W ickmann....................................... 394

Heating Units, Safety Device to Protect. F. H. F ish......................... 197Hot Stage, Microscope, New. I. Amdur and E. V. H jort...................... 259H u m i d i t y , H i g i i - S b n s i t i v i t y A b s o l u t e — R e c o r d e r :

C. Z. Rosecrans................................................................................................. 129Moisture Content of Compressed Nitrogen. A. C. Walker and E.

J. Ernst, Jr................ .................................................................................... 139Preparation of Air of Known Humidity and Its Application to

Calibration of. A. C. Walker and E. J. Ernst, Jr.............................. 134H y d r o c a r b o n s :. Olefin and Aromatic, Determination of. W. F. Faragher, J. C.

Morrell, and I. M . Levine. (Correction, 199)..................................... 18Unsaturated, Problems in Estimation of— in Gases. II— Some

Limitations in Separations by Sulfuric Acid. II. S. Davis andDorothy Quiggle..................................................... ..................................... 39

Volatile, Improved M ethod for Determining— in Soap. C. T . N.M arsh.............................................................................................................. 166

Hydrogen, Carbon, and Nitrogen Determinations Using a MetalTube. S. Avery and D. H aym an.............................................................. 336

H y d r o g e n - I o n M e a s u r e m e n t s :Colorimetric, Problem of Dilution in. II— Use of Isohydric In­

dicators and Superpure Water for Accurate Measurement o f—and Salt Errors. S. F. Acree and E. H. Fawcett.............................. 78

Colorimetric, Use o f Barium Sulfate for Clarifying Soil Suspensionswith Particular Reference to. L. D. Baver and C. J. Rehling. . . . 338

Multiple Standard Colorimeter for. S. L. Leiboff................................. 194Hydrogen Peroxide, Quantitative Determination of Small Amounts

of— and of Ozone. Nelson A llen................................................................ 55Hydrogen Sulfide, Sensitivity of Various Tests for Traces of. E. C.

Truesdale............................................................................................................ 299Hydrometer, Foulk Chain, Construction of Platinum-Wire Chain for.

W. W. Koch and G. F. Smith...................................................................... 41Hydrometer, Special, for Aqua Ammonia. D. F. Farrar...................... 293Hypochlorite. Separation of Nickel and Cobalt by Means of. R . H.

Rhodes and H. J. llosking............................................................................ 164

IG N IT IO N Temperature, Apparatus for Determination of— ofPowdered Substances. P. W. Edwards and R. W. Harrison 344

Ulium Crucibles. See Crucibles.Indicators, Modified Methyl Red and Sodium Alizarin Sulfonate.

A. H . Johnson and J. R. Green................................................................ 2Indicator Tests, Spot, Filtration Pipet for. E. R. Caley....................... 77Inks, Printing, Identification of Aluminum and Magnesium in. L.

M . Larsen........................................................................................................... 416I n s e c t i c i d e s :

Determiuation of Sulfur in Fungicides and— by Carbon DisulfideExtraction. Richard Edge....................................................................... 371

Measuring Toxicity of. A. L. Strand....................................................... 4Modification of Stepanow Method with Particular Reference to

Analysis of. Separation o f Alkyl and Aryl Halogen. QuickLandis and H. J. Wickmann.................................................................... 394

New (Rotenone)............................................................................................... 128Iodimetry, Cupric Oxide as Standard in. T . F. Buehrer and C. M .

M ason....................... 138Iodine, Method for Estimating Aldose Sugars by Titration with—

and Alkali. C. S. Slater and S. F. Acree............................................ 274Modified Method. G. M. Kline and S. F. Acree.................................. 413

Iron, Colorimetric Determination of Silica in Presence of Phosphatesand. L. A. Thayer......................................................................................... 276

Iron, Galvanized, X -R ay Examination of Commercial— by ModifiedReflection Method. C. W . Stillwell and G. L. Clark.......................... 266

JAPAN S. See Varnishes. •

LACQUERS:Pfund Glossmeter Applied to Paints and. G. S. Haslam and L.

W. Grady, Jr . . . . 346Studies. I— Development of Abrasion Test for Use with N itro­

cellulose— . William K och ..................................... 407Thinners, New Application of Abbé Refractometer in Analysis of.

J. D. Jenkins................................................................................................. 127Lamp, Blast, for Natural Gas. H. H. Strain.............................................. 128L e a d :

Alloys. See Alloys.Cable Sheath. See Cable Sheath, Lead.Rapid Volumetric Method for Determination of. R. C. Wiley. . . . 124Salts, Titration of. R. C. Wiley, P. M. Ambrose, and A. D. Bowers. 415 Titration of— by Means of Thermionic Titroraeter. R . W. Gelbach

and K. G. Com pton.................................................................................... 397Levulose, Determination of Dextrose in Presence of. D. T . Englis

and W. J. Byer................................................................................................. 121Levulose, Effect of Dextrose and Sucrose on Determination o f— by

Nijns' Method. F. W. Zerban and Louis Sattler................................. 307Light Transmission. Monochromatic, Quantitative Analysis by.

Monroe Barnard and Paul M cM ichael...................................................... 363Light, Ultra-Violet. Fluorescence of Olive Oil under. A. L. Glantz.. 256Limestones. Dolomitic, Determination of Calcium and Magnesium

in— by Means of Saccharate Solutions. Alkalimetric M ethod. A.C. Shead and B. J. Heinrich............................................. .. . . .................. 388

Lime, Uncombincd, Revised Procedure for Determination of— inPortland Cement. William Lerch and R. II. Bogue. . . .................... 296

Liquid Flow, Constant, Improved Apparatus for Obtaining. W. S.Gil foil................................................................................ .••••;:.......... 232

Liquids, Opaque, Rapid Determination of Relative Viscosities of.M. M. Loeserman............................................................................................ 25

Lithium, Determination of. M . II. Brown and J. II. R eedy................. 304

October 15, 1930

M A G N E SIU M :Aluminum— Alloys. See Alloys.Determination of Aluminum and— in Zinc-Base Die-Casting Alloys.

C. M . Craighead.......................................................................................... 188Determination of Calcium and— in Dolomitic Limestones by Means

of Saccharate Solutions. Alkalimetric Method. A. C. Shead andB. J. Heinrich ........................................................................... 388

Identification o f Aluminum and— in Printing Inks. L. M . Larsen. 410Titrometric Determination of. J. S. Pierce and M. B. Geiger 193

Magnesium Perchlorate, Anhydrous, as Drying Agent. Sam Lenherand G. B. T aylor................. ........................................................................... 58

Malt, Determination of Relative Diastatic Powers of. F. C. Silber­nagel............................. 31

Malt Diastase, Determination of Liquefying Power of. S. J6zsa andH. C. G ore....................... 26

Medals, U. S., for Service in Science............................................................... 206M e l t i n g P o i n t :

Apparatus, Modified Thiele. Ernest C onte.............................. 200Phosphoric Acid for Determination of. F. D. Snell............................ 287Substitute for Amalgamation in Testing Bituminous Materials

for— , Ductility, and Float Test. Hans Eisner................................. 176Tubes, Device for Fastening— to Thermometers. H. L. Lochte. . . . 200

Mercury Cathode, Electrolytic Cell for Use with. A. D. Melaven. . . . 180M e t a l s :

Application of Microscopic Analysis to Mixtures of— and Alloys.W. F. Whitmore and Frank Schneider ........................................ 173

In Foods, Apparatus for Destructive Oxidation of Organic Materialin Determination of. J. W. Barnes...................................................... 107

Use of Protective Colloids in Colorimetric Determination of Certain— as Lakes of Dyes. W. E. Thrun........................................................ 8

Methanol and Fusel Oil, Denmark Changes Duties on.............................. 345Methyl Red Indicators. See Indicators.Microscope Hot Stage, New. I. Amdur and E. V. H jort....................... 259Microscope, Polarizing, in Organic Chemistry. H. C. Benedict 91M i c r o s c o p i c a l A n a l y s i s :

Application of— to Mixtures of Metals and Alloys. W . F. Whitmoreand Frank Schneider................................................................................... 173

Chemical Micrurgy. Method for Studying Characteristics of Microscopic Quantities of Material. R . N. Titus and H. LeB.Gray......................................... 368

Determination of Particle Size of Pigments and Powders. E. J.Dunn, Jr......................................................................................................... 59

Improved Technic for Qualitative—of Silver Group. A. Bene-detti-Pichler ........................ . ................ . 309

Microscopical Examination of Precipitates as Aid to Precise Analysis.I— Estimation o f Sulfates as Barium Sulfate. Stephen PopoiTand E. W. Neuman ................ 45

Microscopical Methods in Analytical Chemistry. Symposium onAnalytical Chemistry. C. W. M ason................................................... 203

Milk, Boiling— in Aluminum Does Not Destroy Vitamin C ..................... 224Milk Products, Cholesterol as Measure of Egg Yolk in. L. M . Lam-

pert.............................................................. 159Mixtures, Constant-Boiling, Physical Methods of Separating. A. A.

Sunier and Charles Rosenblum.................................................................... 109M o i s t u r e :

Content of Carbon Blacks. W. B. Plummer......................................... 57Content of Compressed Nitrogen. A. C. Walker and E. J. Ernst,

Jr...................................................................................................................... 139Content of W ood, Electrical Conductivity Method for Determining.

A. J. Stamm....................................... 240Proof Determination of Waxed Papers. C. A. Thomas and H. J.

Reboulct....................................................... 390See also Humidity.

M othproofing Compounds, Methods of Testing. William Moore. . . . 365M otion Picture Studios, Wallboard to Soundproof.................................... 75

N APH TH AS, Determination of Vapor Pressures of. J. C. Stauffer,J. K . Roberts, and W. G. W hitman........................................................... 88

Nickel, Separation of— and Cobalt by Means of Hypochlorite. F.H. Rhodes and H. J. H osking.................................................................... 164

Nitrocellulose Lacquers. See Lacquers.N i t r o g e n :

Carbon, and Hydrogen Determinations Using a Metal Tube. S.Avery and D. Haym an.............................................................................. 336

Carbon Dioxide Generator for Combustion Analysis in Estimationof. E. J. Poth ............................................................................................. 250

Compressed, Moisture Content of. A. C. Walker and E. J. Ernst,Jr.................................................................................................. 139

Determination of— and Acetyl Content of Cellulose Nitroacetate.W. M. Billing and J. S. Tinsley .................................................. 380

Estimation of Total— of Plant Extracts in Presence of Nitrates. G.W. Puchcr, C. S. Leavenworth, and II. B. V ickery............................ 191

Fertilizers, Italian Production o f ................................................................. 44Nitrogen Oxides (except Nitrous Oxide), Determination of— in Low

Concentration. J. Piccard, E. G. Peterson, and C. D. Bitting. . . . 294Nitrogen Peroxide, Rapid Determination of— in— Air Mixtures. C.

W. Whittaker, F. O. Lundstrom, and A. R. M erz................................. 15

O IL :Bleaching Test, Official Method of American Oil Chemists’ Societ}’ .

Chieh Ma and J. B. W ithrow................................................................... 374Crude. See Petroleum.Determination of Acidity of— and Fats by Quinhydrone Electrode

in Non-Aqueous Solutions. Harry Seitz and Louis Silverman. . . . 1Direct Determination of— in— Watcr-Soap Emulsions. L. N.

M arkw ood........................................ 265Fatty, Sulfur Monochloride Reaction of. E. H. Harvey and II. A.

Schuette.................................. ...................................................................... 42Fusel, Denmark Changes Duties on—and M ethanol............................ 345Olive, Fluorescence of— under Ultra-Violet Light. A. L. Glantz. . . 256Photochemical Method for Measuring Susceptibility of Fats and—

to Oxidation. G. R. Greenbank and G. E. H olm .......................... 9Pine, Quantitative Hydrogenation of Principal Unsaturated Com­

ponents of Turpentine. — , and Rosin. W. E. Shaefer................... 115Organic Chemistry, Polarizing Microscope in. H. C. Benedict 91Oven. Dutch, and Hot Plate, Aluminum. H. V. Churchill and R. W.

Bridges............................. :*•••...................... .••••_............... • • • 335Oxidizing Agent, Perchloric Acid as— in Determination of Chromium.

J. J. Lichtin - -.- ................. 126Oxygen, Industrial Analysis and Recording of Carbon Dioxide and—

in Air. W. F. Hamilton................................................................................ 233Ozone, Quantitative Determination of Small Amounts of Hydrogen

Peroxide and. Nelson Allen........................................................................ 55

433

PA IN T :Evaluation of Contrast-Obliterating and Brightening Power of White

Pigments. G. S. Haslam........................................................................ 69Measurement of Leveling Properties of— and Enamels. G. S.

Haslam and L. D. Grady, Jr.................................................................... 66Modification of Spinning-Film Hiding-Pow’er Method. G. S.

Haslam........................................................................................................... 319Pfund Glossmeter Applied to— and Lacquers. G. S. Haslam and

L. D. Grady, Jr............................................................................................ 346Pigments, Microscopic Measurements for Determination of Particle

Size of— and Powders. E. J. Dunn, Jr............................................... 59Wet, Experimental Determination of Brightness-Fihn Thickness

Curves of. D. L. Gamble and A. H. Pfund.................................. 63P a p e r :

Flax as— Making Material............................................................................ 419Null-Point Method o f Potentiometric Titration for Determining

Acid or Alkali in. B. L. Clarke and L. A. W ooten............................ 385Plotting, Vapor-Pressure. D. S. Davis.................................................... 303Waxed, Moisture-Proof Determination of. C. A. Thomas and H.

J. Reboulet.............................................................................................. 390Particle Size of Pigments and Powders, Microscopic Measurements

for Determination of. E. J. Dunn, Jr............................................... 59Penetrometer, Micro-, Application of— to Testing of Fats. E. Freyer 423Perchlorate, Determination of. H. H. Willard and J. J. Thompson. . 272Perchloric Acid as Oxidizing Agent in Determination of Chromium.

J. J. L ichtin................................................................................................. 126Percolation, Apparatus for—at Uniform Rate and Automatic Collect­

ing Device. P. L. Hibbard.......................................................................... 404Permanganate Solution, Standard, Standardization of Thiosulfate

against. T . F. Buehrer and C. M . Mason. (Correspondence). . . . 138Petroleum. Crude Oil, True Boiling— Analysis. G. A. Beiswenger

and W. C. Child........................................................................................ 284Petroleum Distillates, Modification of Lamp Method for Determining

Total Sulfur in. A. E. Wood and William M attox........................ 24Phenol, Quantitative Separation of— from Cresols and Higher Phenols.

J. N. Miller and O. M. Urbain............................................................... 123Phosphate, New—-Resources in Russia......................................................... 313Phosphates, Colorimetric Determination of Silica in Presence o f—and

Iron. L. A. Thayer................................................................................ 276Phosphoric Acid for Determination of Melting Points. F. D. Snell. . . 287Photo-Electric Cell, Applications o f— to Chemical Analysis and Con­

trol. Symposium 011 Analytical Chemistry. II. M. Partridge 207Photographic Estimation of Foreign Materials in Gums and Resins.

E. A. Georgi......................................................................................................... 331Photometer, Burgess-Parr Sulfur, Application o f— to Rapid Deter­

mination of Sulfur in Foods and Biological Material. E. W.Toepfer and P. W. Bout well........................................................................ 118

Pipet, Filtration, for Spot Indicator Tests. E. R. Caley........................ 77Pipets, Rinsing. G. M . Kline........................................................................... 427P l a n t :

Extracts, Determination of Total Nitrogen o f— in Presence of Nitrates. G. W. Puchcr, C. S. Leavenworth, and II. B. Vickery. 191

Materials, Determination of Boron in Natural Waters and. L. V.W ilcox................................................................... 358

Materials, System of Proximate Chemical Analysis of. S. A. Waks-man and K. R. Stevens............................................................................. 167

Tissues, Effect of Degree of Pulverization and Weight of Samples on Quantitative Analyses, with Particular Reference to. R. C.Malhotra........................................................................................................... 398

Plastometer, Goodrich, Simplified. E. Karrer, J. M. Davies, andE. O. Dicterich................................................................................................. 96

Plate, Hot, and Dutch Oven, Aluminum. H. V. Churchill and R. W.Bridges................................................................................................................... 335

Platinum Wire. See Chain.Polariscopic Measurements, Source of Error in. 11. K . Miller and

J. C. Andrews................................................................................................... 283Potassium Bromate, Determination of Chromium and Vanadium

after Oxidation with. I. M. Kolthoff and E. B. Sandell.................... 140Potentiometric Titration for Determining Acid or Alkali in Paper,

Null-Point Method of. B. L. Clarke and L. A. W ooten .................... 385Potentiometric Titrations. Symposium on Analytical Chemistry.

N. H. Furman................................................................................................... 213P o w d e r s :

Apparatus for Determination of Ignition Temperature of. P. W.Edwards and R. W, Harrison.................................................................. 344

Microscopic Measurements for Determination of Particle Size ofPigments and. E. J. Dunn, Jr................................................................ 59

Smokeless, Double-Base, Determination of Centralite in. II.Levenson...................................................... 246

Precipitates, Microscopic Examination o f—as Aid to Precise Analysis.I— Estimation of Sulfates as Barium Sulfate. Stephen Popoff andE. W . Neuman.............................................................................................. 45

Proteins, Determination of Labile Sulfur in Gelatin and. S. E.Sheppard and J. II. H u d son ....................................................................... 73

Pycnoraeter, Determination of Alcohol by. A. F. Fuerst...................... 30Pyrrole Test, Quantitative Application of. Early Stages of Oxidation

in Rubber. J. W. Temple, S. M. Cadwell, and M. W. Mead, Jr.. . . 377

Q U IN H Y D R O N E Electrode. See Electrode.

R A R E Earths, Observations on— X X X IV . Spectrographic Esti­mation of Impurities in. P. W. Selwood 93

Rayon Plants, Russia Plans................................................................................ 357Reflux Regulator for Laboratory Stills. J. H. Bruun................................. 187Refractometer, Abbé, New Application o f— in Analysis of Lacquer

Thinners. J. D. Jenkins.................. 127Relay, Electromagnetic, for Use in Regulatory Circuits. L. G.

Wesson............................................................................ 179Resins and Gums, Photographic Estimation of Foreign Materials in.

E. A. Georgi......................................................................................................... 331Resins, Dark-Colored, Acid Numbers of. H. II. Coburn.......................... 181Rosin, Quantitative Hydrogenation of Principal Unsaturated Com­

ponents of Turpentine, Pine Oil, and. W . E. Shaefer............................ 115Rotenone, New Insecticide.................................................................................. 128

R u b b e r :Autographic Stress-Strain Curves o f— at Low Elongations. A. A.

Somerville, J. M . Ball, and L. A. Edland........................................ 289Automotive Parts, Testing of— Assembled under Compression.

F. D. Abbott:I— Deflection under Compression.............................................................. 145II— Compression-Set and Some Special Tests....................................... 153

INDUSTRIAL AND ENGINEERING CHEMISTRY

434 AN ALYTICAL EDITION Vol. 2, No. 4

Cements, Thick, Application of Falling Cylinder to Measurementof Viscosity of. W . F. Busse and W. B. Doggett.............................. 314

Consumption in United States in 1929...................................................... 103Early Stages of Oxidation in. Quantitative Application of Pyrrole

Test. J. W. Temple, S. M . Cad well, and M. W . Mead, Jr............. 377Estimation of Degree o f Penetration of— into Fabrics. E. O.

Dieterich........................................................................................................ 102Flexing Test for Tire Carcass Stocks. W . A. Gibbons........................ 99Laboratory Evaluation of Flex-Cracking Resistance. L. V. Cooper. 391Method o f Making Microsections of. R . P. Allen................................ 311Method of Preparing Microsections of. T . F. Steele........................... 420Plastometer, Goodrich, Simplified. E. Karrer, J. M . Davies, and

E. O. Dieterich............................................................................................. 96Sunchecking o f ............... 85

SAC C H AR A TE Solutions, Determination of Calcium and Magne­sium in Dolomitic Limestones by Means of. Alkalimetric Method.A. C. Shead and B. J. Heinrich................................................................... 388

Salt Brines, Determination of Chlorides in. S. L. N eave...................... 28Shaker, Laboratory. H. E. Bent................................................................... 106Shellac, Determination of Insolubles in. A. G. Stillwell........................ 420Shellac, Determination of Wax in. A. G. Stillwell................................... 387Silica, Colorimetric Determination of— in Presence of Phosphates and

Iron. L. A. Thayer........................................................................................ 276Silica-Glass Joints, Cement for. C. G. M aier............................................ 337Silver Group, Improved Technic for Qualitative Microanalysis of.

A. Benedetti-Pichler........................................................................................ 309Soap, Direct Determination of Oil in Oil-Water— Emulsions. L. N.

M arkwood.......................................................................................................... 265Soap, Improved M ethod for Determining Volatile Hydrocarbons in.

C. T . N. Marsh............................................................................................. 166Sodium Alizarin Sulfonate Indicators. See Indicators.Sodium Peroxide as Fusion Medium with Some New Factors Relating

to Its Use. S. W . Parr.................................................................................. 10Soil. Apparatus for Percolation at Uniform Rate and Automatic

Collecting Device. P. L. Hibbard............................................................. 404Soil Suspensions, Use of Barium Sulfate for Clarifying— with Par­

ticular Reference to Colorimetric pH Determinations. L. D. Baverand C. J. Rehling................;............................................................................ 338

Solids, Device for Rapid Estimation o f Density o f Small Amounts of.E. R. Caley........................................................................................................ 177

Solids, Opaque, Rapid Method of Qualitative Color Comparison for.J. J. Shank and J. S. M artin........................................................................ 343

Solutions, Non-Aqueous, Determination of Acidity of Oils and Fats byQuinhydronc Electrode in. Harry Seitz and Louis Silverman 1

Solutions, Standard, Corrections for— of Inconvenient Strengths.Selma G ottlieb . ................................................................................. 186

Spectroscope, Detection of Fluorine by. Jacob Papish, L. E. Hoag,and W . E. Snee................................................................................................. 263

Spot Indicator Tests, Filtration Pipet for. E. R. C aley........................ 77Steel Analysis, Separate Titration of Chromate and Vanadate in

Same Solution and Application of Method to. I. M . Kolthoff andE. B. Sandcll..................................................................................................... 140

Stibnite, Evaluation of. I I— Determination of Antimony. W. M.McNabb and E. C. W agner.......................................................................... 251

Still. See Distillation.Sucrose, Effect of Dextrose and— by Determination of Levulose by

Nijns’ Method. F. W. Zcrban and Louis Sattler.................................. 307S u g a r s :

Aldose, Method for Estimating— by Titration with Iodine andAlkali. C. S. Slater and S. F. Acree................................... 274

Modified Method. G. M . Kline and S. F. Acree.............................. 413Cane, Ash and Electrical Conductivity of Sirups and Molasses D e­

rived from. F. W. Zerban and Louis Sattler..................................... 32Color in— Industry. I l l — Preparation of Asbestos for Use as Filter

Aid. J. F. Brewster and F. P. Phelps.................................................. 373Unified Conductometric Method for Determination of Ash in R e­

finery Sirups. F. W . Zerban and Louis Sattler................................. 322See also kind o f sugar.

Sulfates, Estimation o f— as Barium Sulfate. Microscopic Exami­nation o f Precipitates as Aid to Precise Analysis— I. StephenPopoff and E. W. Neuman............................................................................ 45

S u l f u r :Determination of— in Insecticides and Fungicides by Carbon D i­

sulfide Extraction. Richard Edge........................................................ 371In Foods and Biological Material, Application o f Burgess-Parr—

Photometer to Rapid Determination of. E. W. Toepfer and P.W. Bout well.................................................................................................. 118

In Gasoline, Determination of. Graham Edgar and George Calin-gaert............... 104

Labile, Determination of— in Gelatin and Proteins. S. E. Sheppardand J. H. Hudson............................................................................................ 73

Subsequent Additions of Acid in Carius Combustions. D. D.H artley............................................................................................................ 328

Total, Modification of Lamp M ethod for Determination of— inPetroleum Distillates. A. E. W ood and William M attox............. 24

Sulfuric Acid, Limitations in Separations by. Problems in Estimation of Unsaturatcd Hydrocarbons in— II. II. S. Davis and DorothyQuiggle................................................................................................................ 39

Sulfur Monochloridc Reaction of Fatty Oils. E. II. Harvey andH. A. Schuette............................................................................................... 42

Switches, Magnetic, in Regulatory Circuits. C. G. M aier.................... 258

T A N N IN , Chestnut Trees Retain— Long after Death............................. 62Tantalum, Use of— as Cathode for Electrodeposition of Copper. B.

Mears and P. R . Pine..................................................................................... 298Tartrates, Volumetric Determination of. P. H. R ichert........................ 273Temperature, Providing for Changes of— in Volumetric Analysis. M.

G. M ellon........................................................................................................ 260Thermometers, Device for Fastening Melting-Point Tubes to. H. L.

Lochte.................................................................................................................. 200Thermoregulators, Improvements in. H. J. W ing.................................... 196Thermoregulators. Relay for Use in Regulatory Circuits. L. G.

Wesson................................................................................................................ 179Thiosulfate, Standardization of— against Standard Permanganate

Solution. T . F. Buehrer and C. M . Mason. (Correspondence.).. 138Tin, Reductor Apparatus for Detecting. J. II. R eedy............................ 117Titration Table, Convenient Arrangement for. J. W . Stillman and

T. L. Bartleson................................................................................................. 108Titrometer, Thermionic, Titration of Lead by Means of. R . W. Gel­

bach and K. G. Com pton.............................................................................. 397Turbidity, Measurement of. C. D. Ingersoll and R. E. D avis............. 248Turpentine, Pine Oil, and Rosin, Quantitative Hydrogenation of

Principal Unsaturated Components of. W . E. Shaefer....................... 115

V A N A D IU M , Determination of— and Chromium after Oxidation with Potassium Bromate. I. M . Kolthoff and E. B. Sandell . . . . . . 140

Vapor Pressure of Naphthas, Determination of. J. C. Stauffer, J. K .Roberts, and W . G. W hitman..................... 88

Vapor-Pressure Plotting Paper. D. S. D av is . ..................................... 306Varnishes, Japans, Driers, and Alloys, Determination of Cobalt in.

Oscar H eim ........................................................................................................ 38Viscometer, Saybolt Universal, Convenient Accessories for Use with.

Carl Winning..................................................................................................... 417Viscometer, Vacuum-Tube Falling-Ball, Improved Form of. L. P.

Moore and A. C. Cuthbertson...................................................................... 419V i s c o s i t y :

Application of Falling Cylinder to Measurement o f— of ThickRubber Cements. W. F. Busse and W . B. D oggett......................... 314

Jelly Strength and— of Glue, Standard Methods (Revised) for De­termining. National Association of Glue Manufacturers............... 348

Relative, Rapid Determination o f— of Opaque Liquids. M . M.Loeserman...................................................................................................... 25

Vitamin C, Boiling Milk in Aluminum Does N ot D estroy....................... 224

W A L L B O A R D to Soundproof M otion Picture Studios........................... 75Water, Natural, Determination of Boron in— and Plant Materials.

Modification of Chapin Method. L. V. W ilcox.................................... 358See also Moisture.

Wax, Determination o f— in Shellac. A. G. Stillwell................................ 387Weighing Tube, Duplex. W . E. Eskew and F. C. Vilbrandt.................. 181W o o d :

Acids, Volatile, Estimation of— Corrosive to Lead Cable Sheath.R . M. Burns and B. L. Clarke................................................................. 86

Electrical Conductivity Method for Determination of MoistureContent of. A. J. Stamm.................................................................... . 240

Preservatives, Suggested Titrimetric M ethod for. Henry Schmitz and Others..................................................................................................... 361

X -R A Y S . Examination of Commercial Galvanized Iron by ModifiedReflection Method. C. W. Stillwell and G. L. Clark............................ 266

ZIN C , Confirmatory Test for. J. S. Pierce and E. D. Nave................. 190Zinc, Determination of Aluminum and Magnesium in— Base Die-

Casting Alloys. C. M . Craighead.............................................................. 188