NEW FROM BUCHLER Auto DENSI-FLOW.for density gradients The Auto Densi-Flow is ideal for depositing generated gradients or in the automatic withdrawal of centrifuged samples. It eliminates the need to push up the formed gradient with a heavy solution which might cause diffusion of bands and a spoiled experiment. This new automated instrument also deposits a generated gradient in a linear fashion into all commercially available centrifuge tubes. Additional advantages are: speed of operation; elimination of piercing of centrifuge tubes and compatibility with all types of centrifuge tubes without the need for adapters. Write today for complete information on the Auto Densi-Flow - the modern tool for density gradient work. For further informotion write for Technical Bulletin 52-5160A 19 DECENIBER 1969 LABORATORY APPARATUS * PRECISION INSTRUMENTS BUCHLER INSTRUMENTS, INC. 1327 16TH STREET, FORT LEE, NEW JERSEY 07024 Circle No. 8 on Readers' Service Card 1557
Transcript
NEW FROM BUCHLERAuto DENSI-FLOW.for density gradientsThe Auto Densi-Flow is ideal for depositing generated gradients or in the automaticwithdrawal of centrifuged samples. It eliminates the need to push up the formedgradient with a heavy solution which might cause diffusion of bands and a spoiledexperiment. This new automated instrument also deposits a generated gradient in a
linear fashion into all commercially available centrifuge tubes.
Additional advantages are: speed of operation; elimination of piercing of centrifugetubes and compatibility with all types of centrifuge tubes without the need foradapters. Write today for complete information on the Auto Densi-Flow - the moderntool for density gradient work.
For further informotion write for Technical Bulletin 52-5160A
19 DECENIBER 1969
LABORATORY APPARATUS * PRECISION INSTRUMENTS
BUCHLER INSTRUMENTS,INC.1327 16TH STREET, FORT LEE, NEW JERSEY 07024
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BOOKS RECEIVED
(Continuzied from page 1501)
Biological Investigations and Observa-tions. A Series of Laboratory Sessions forIntroductory Biology. Marland L. Madson.Burgess, Minneapolis, ed. 2, 1969. vi +278 pp., illus. Spiral bound, $5.25.
Calculus. Vol. 2, Multi-Variable Calculusand Linear Algebra, with Applications toDifferential Equations and Probability.Tom M. Apostol. Blaisdell, Waltham,Mass., ed. 2, 1969. xxiv + 680 pp., illus.$13.50. Pure and Applied Mathematics.
Catalog of Meteorological Instrumentsin the Museum of History and Technol-ogy. W. E. Knowles Middleton. Smith-sonian Institution Press, Washington, D.C.,1969 (available from the Superintendentof Documents, Washington, D.C.). vi +130 pp., illus. $3.25. Smithsonian Studiesin History and Technology, No. 2.The Chasm Ahead. Aurelio Peccei.
Macmillan, New York; Collier-Macmil-lan, London, 1969. xviii + 302 pp. $7.50.
Chemical Separation Methods. John A.Dean. Van Nostrand Reinhold, New York,1969. xiv + 402 pp., illus. $13.50Chemistry and Chemical Engineering:
A Survey of Research and Development inCanada. Prepared by a Study Group ofthe Chemical Institute of Canada.A. E. R. Westman, Study Director. Sci-ence Council of Canada, Ottawa, 1969(available from the Queen's Printer, Ot-tawa). xxii + 104 pp. Paper, $2.50. Spe-cial Study No. 9.
Class and Conformity. A Study inValues. Melvin L. Kohn. Dorsey, Home-
Classical Descriptions of Motion. TheDynamics of Particle Trajectories, RigidRotations, and Elastic Waves. Emil JanKonopinski. Freeman, San Francisco, 1969.xvi + 504 pp., illus. $15.
Clinical Analysis by Thin-Layer Chrom-atography Techniques. Ronald M. Scott.Ann Arbor-Humphrey Science Publishers,Ann Arbor, Mich., 1969. xii + 228 pp.,illus. $18.75.
Coastal Landforms of Cat Island,Bahamas. A Study of Holocene Accre-tionary Topography and Sea-Level Change.Aulis 0. Lind. Department of Geogra-phy, University of Chicago, Chicago,1969. xvi + 160 pp., illus. Paper, $4.Department of Geography Research Pa-per No. 122.
Comprehensive Chemical Kinetics. Vol.2, The Theory of Kinetics. C. H. Bamfordand C. F. H. Tipper, Eds. Elsevier, NewYork, 1969. xiv + 486 pp., illus. $36.
Contingencies of Reinforcement. A The-oretical Analysis. B. F. Skinner. Appleton-Century-Crofts, New York, 1969. xvi +320 pp. $6.50. Century Psychology Series.
Critical Path Method. Introduction andPractice. A. T. Armstrong-Wright. Hu-manities Press, New York, 1969. xii +116 pp., illus. Cloth, $3.50; paper, $2.
Cycles Biologiques et Psychiatrie. ThirdBel-Air Symposium, Geneva, September1967. Under the direction of J. de Ajuria-guerar. Georg, Geneva; Masson, Paris,1969. 424 pp., illus. Paper, 50 F.
but it will never'snow'you backSometimes you can't help it. In certainweighing situations no matter how hardyou try, a balance gets dirty fromspilled or overflowing powders. Orfrom dust in the air.When this happens on a conventional
knife-edge balance, the knife-edge ful-crum becomes dirty-gets gummed up,and eventually wears. Increased fric-tion, decreased sensitivity and inac-curacy result. (In time even smallamounts of dirt in the atmosphere willhave this effect.)On the other hand, with a Torsion
Balance based on fulcra which twistinstead of roll, this cannot happen.There are no friction pivots or knife-edge fulcrum; thus no metal-to-metalwear, and the weighing mechanism
cannot be affected by foreign material.The balance will not become sluggish,it retains its initial accuracy and sensi-tivity, and because of its virtuallyone-piece construction, adjustment ispermanent.The Torbal DWL2 shown above is
a 120-gram capacity balance with adial accuracy of 5 mg.; silicon fluiddamping for fast weighing; dials with9 g x 1 g, and 1 g x 0.01 g graduations,to eliminate use of small loose weights.Write today for literature.
The Torsion Balance Company TORBALDepartment S vNlain Office and Factory: Clifton, N.J.;Sales Offices: Birminigham, Ala.; Chicago,Ill.; San M\ateo, Cal.; Pittsburgh, Pa.; PlantsaInd Offices in Montreal. Quebec; London,E[nland and Vs aterford, Ireland
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RESEARCH-PROVEDAll Purina Laboratory Chows are:*specifically formulated tomeet the nutritional needs re-quired by the animal.* Micro-Mixed to assure com-plete nutrition in every Checker.* biologically assayed.* manufactured under strictcontrols to help prevent drugcontamination.
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AnalYze a 25pmicrosoot area invirtually anYsolid materialThe Jarrell-Ash Mark I I Laser Microprobe is Gunique excitation source that vaporizes areasas small as 25,i in diameter for spectrographicanalysis.
Unlike other analytical instruments, theLaser Microprobe analyzes virtually any solidmaterial-without extensive sample prepara-tion or concern for the sample's electricalconductivity. You simply position the sampleon the microscope stage . . . select area to beanalyzed . . . then fire the laser.
This precise unit uses a microscope to pre-select the exact area to be analyzed. A stable,air-cooled neodymium laser vaporizes samples.
Ceramic, glass, metal, biological, geological,pharmaceutical, even lunar samples are quick-ly and inexpensively handled by the Mark II.
Use the Jarrell-Ash Laser Microprobe withany commercially available spectrograph. Letit extend your spec-trographic capabilities.
For further information,write: Jarrell-Ash Division,Fisher Scientific Company590 Lincoln StreetWaltham, Mass. 02154Phone: (617) 899-4300
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Reprints from ScienceThe following reprints are now available from AAAS Re-
prints, 1515 Massachusetts Ave., NW., Washington, D.C.20005. Please enclose payment with order. Do not send cur-rency.
H. J. Brudner, "Computer-Managed Instruction" (29 Nov.1968), 8 pages
C. A. Doxiadis, "Man's Movement and His City" (18 Oct.1968), 12 pages
M. F. Gilula and D. N. Daniels, "Violence and Man's Strug-gle To Adapt" (25 Apr. 1969), 12 pages
G. Hardin, "The Tragedy of the Commons" (13 Dec. 1968),8 pages
L. D. Harmon and K. C. Knowlton, "Picture Processing byComputer" (4 Apr. 1969), 12 pages
L. D. Jaffe, "Surveyor Lunar Landings" (16 May 1969), 16pages
E. P. Adom, "The Strategy of Ecosystem Development" (18Apr. 1969), 20 pages
A. T. Weil, N. E. Zinberg, J. M. Nelsen, "Clinical and Psy-chological Effects of Marihuana in Man" (13 Dec. 1968),12 pages
Reprints of other articles published since 1 September 1968can be made available in quantities of 25 or more for class-room use. Identify each article by author, title, page num-ber, and issue date.
PRICES AND TERMSOne reprint-$1.00 Two to nine reprints-60¢ each
With a capacity of 3200 ml/hr, theModel 380 DIALAGRAD ProgrammedGradient Pump is especially suitedfor filling zonal rotors as well as form-ing liquid chromatographic elutiongradients and similar applications.Almost any two component gradientcan be formed by simply setting aseries of dials. There are no cams tocut or multiple solutions to mix atestimated concentrations. The shapeof the curve is determined by settingeleven 0 to 100% dials which repre-sent the initial, final, and nine evenlyspaced intermediate ratios. This gives10 program intervals, each of whichare automatically subdivided by fivelinear interpolations to produce asmooth gradient.
Calibrated flow rates from 1 to3200 ml/hr and program durationsfrom 5 minutes to 16 days are setwith positive stop switches. TheDIALAGRAD will produce linear orcurved gradients with equalaccuracy and the program will beperfectly reproducible run after run.The instrument takes but a fewminutes to program and requires noattention during a program run.
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Down the Colorado. Diary of the FirstTrip through the Grand Canyon, 1869.John Wesley Powell. Photographs andepilogue 1969 by Eliot Porter. Forewordand notes by Don D. Fowler. Dutton,New York, 1969. 168 pp. Until 1 Janu-ary, $25; thereafter, $30.Dream Psychology and the New Biol-
ogy of Dreaming. A symposium, Cincin-nati, Ohio, October 1967. Milton Kramer,Ed., in collaboration with Roy M. Whit-man, Bill J. Baldridge, and Paul H. Orn-stein. Thomas, Springfield, Ill., 1969. xxvi+ 462 pp., illus. $17.Thhe Economy of Death. Richard J.
Barnet. AthenieuLm, New York, 1969. vi+ 202 pp. $4.95.
Education and Identity. Arthur W.Chickering. Jossey-Bass, San Francisco,1969. xvi + 368 pp., ilIlis. $9.50. Jossey-Bass Series in Higher Education.
Electrophoresis-Technical Applications.A Bibliography of Abstr-acts. B. J. Hay-wood. Ann Arbor-Huimphrey Science Pulb-lishers, Ann Arbor, Mich., 1969. x + 446pp. $18.75.
Eiiergy Metabolism of Farm Animilals.Proceedings of the 4th sympositum, War-saw, September- 1967. K. L. Blaxter. J.Kielanowski, and Greta, Thorbek, Eds.Oriel, Newcastle upon Tyne, England,1969. xx + 524 pp., illtus. £5.25. Euro-pean Association for Animal Production,PUbl. No. 12.
Epidemiology of Mongolism. AbrahamM. Lilienfeld, with the assistance ofCharlotte H. Benesch. Johns HopkinsPress, Baltimore, 1969. xiv + 146 pp.,illtus. $7.
Experim-lental Approaches to the Studyof Drug Dependence. Proceedings of aninterdisciplinary research conference, To-ronto, March 1965. Harold Kalant andRosemary D. Hawkins, Eds. Published forthe Addiction Research Foundation byUniversity of Toronto Press, Toronto,1969. xviii + 238 pp.. illtIs. $6.50.Exploring witlh a Microscope. Seymour
Simon. Random House. New York, 1969.vi + 82 pp., illus. $2.95.
Extra-Terrestrial Matter. Proceedings ofa conference, Argonne, Ill., March 1968.Charles A. Randall, Jr., Ed. NorthernIllinois University Press, D1kalb, 1969. xx+ 332 pp., illIs. $12.50.
Fifth International Symposium on Chro-matography and Electrophoresis. Brussels,September 1968. P. de Moerloose, Chair-man. Ann Arbor-HUmphrey Science Pub-lishers, Ann Arbor, Mich., 1969. 596 pp.,illuis. $21.50.La Fisica Concettuale. Revisione delle
categorie del pensiero scientifico e visioneunitaria del mondo fisico stille basi delladialettica di Hegel. Giovanni Pietro Per-ona. Unione Tipografica Editrice Piacen-tina, Italy, 1969. 144 pp., illus. Paper. LaScienza del Pensare, vol. 1.
Frontiers of Space. The Pocket Encyclo-pedia of Spaceflight in Color. Philip Bonoand Kenneth Gatland. Illustrated by JohnW. Wood, Tony Mitchell, Norman Din-nage, William Hobson, Jack Pelling, andBrian Hiley. Macmillan, New York, 1969.248 pp. $3.95.
UDP N-Acetyl glucosamine-1-C14NEC-580 >40mc/mM$90/5Sic $350/25'cWrite for complete radiochemicalspecifications.Fall '69 Addendum listing all new com.pounds since April '68 now published.Write for your copy.
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Hugh F. Henry. Wiley-lnterscience, NessYork, 1969. xx + 492 pp., illIs. $17.50.Fundamentals of Temperature Control.
William K. Roots. Academic Press, NewYork, 1969. xviii + 222 pp., illus. $12.50.Gem Hunter's Guide. The Complete
Handbook for the Amateur Collector ofGem Minerals. RuLssell P. MIacFall.Crowell, New York, ed. 4, 1969. vi + 282pp. + plates. $5.95.
Hair Growth. Proceedings of a sympo-siLini, Beaverton, Oregon, 1967. Williamlklontagnat and Richard L. Dobson, Fds.Perganmon, New York, 1969. xxii + 586pp. + plates. $21.50. Oregon RegionalP'rim,ate lResearch Center, Puibl. No. 277.Advances in Biology of Skin, vol. 9.Heralds of Science. As RZepresented by
lTwo HLundred Epochal Books and lP.nm-phlets Selected from the Buirnldyv ibrary.With notes by Bern Dibner. M.l..I'ress,Cambridge. Mass.. 1969. 96 pp., illtis.Paper, $2.95. Reprint of the 1955 editioni.
Histological Typing of Soft TissueTumiours. F. M. Enzinger, in collaiborationwith R. Lattes and H. T-orloni. WorldHealth Organization, Geneva. 1 969(available froni Americain Puiblic HealthAssociation, New York). 44 pp. + plates.Includes 152 color slides. $50. Interna-tional Histological Classification of Tu-mours, No. 3.Hormonal Control Systems. Proceedlings
of a symposium11. Rancho Santa Fe, Calif..October 1967. Fdwin B. Stealr. Arnold H.Kadish, George Bekey, Charles Haun.Charles Sawyer, andt R. Sridhar. Eds.Elsevier, New York, 1969. xiv + 306 pp.,illus. $16. Niatheniatical Bioscienices,Suppl. 1.The Hudson River. A NatUra'-l aind Un-
natural History. Robert H. Boyle. Norton.New York, 1969. 304 pp. + plates. $6.95.The Humani Nature of a Uniiversity.
Robert F. Goheen. P'rinceton UnisersityPress, Princeton, N.J., 1969. x + 118 pp.$4.50.
Thje Human Zoo. Desmond Morris.NlcGraw-Hill. New York, 1969. 256 pp.S6.95.
Industrial Chemistry anid Techinology ofPlhosphoruis and Plhosphoruis Compounlds.A SUrvey. John RZ. Van Wazer. Inter-science (Wiley), New York, 1969. lIluts.Paper. $4.95. Reprint of Encyclopedia ofChemical Technology, vol. 15, ed. 2. pp.232-330.
Intelligenice anid Crime. A Study ofPenitentiary and Rteformatory Offenders.Simon H. Tuilchin. University of ChicagoPress, Chicaigo, 1969. vi + 82 pp., illtis.$8.50. Reprint of the 1939 edition.Double-Page Reprint Ser-ies.
International Politics and Foreign Policy.A Reader in Reseairch and Theory. JamesN. Rosenau, Ed. Free Press, New York:Collier-Macmillan, I ondon, 1969. xxii +746 pp., ilhtis. $9.95. Revised version ofthe 1961 edition.An Introductioni to Ton in and Country
Planning. A. J. Brown and H. M. Sher-rard. Revisedi from the 1951 edition bythe original atithors and J. H. Shaw.Elsevier, New York., 1969. xxxii + 392pp. + plates. $25.
Involuntary Movemenit Disorders. IrvingSpencer Cooper. lilistrations by MfaryLorenc. Photographs by Rosemarie Spita-leri. Harper and Row, New York, 1969.xxii + 410 pp. $29.50.19 DECEMBER 1969
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Isotope Effects in Clhemiiical Processes.Based on a1 symposium, Miami Beach,Fla., April 1967. William Spindel, Sym-posiutiu Chalirai-na. American Chemical So-ciety, Washinlgton, D.C., 1969. x + 280pp., illLIS. $13. Advances in ChenlistrySeries, No. 89.John Wilkins 1614-1672. An Intellectual
Biography. Barbara J. Shapiro. Universityof (California Press, Berkeley, 1969. xii +336 pp. $9.50.
The Key. John lPhilip Cohane. Crown,Ncss Yo-k, 1969. 288 pp., illuis. $7.50.
TIhe Kodiak Island Refuguim. Its' Geol-ogy, Flora, Fauna and History. Thor N. V.Karlstromnand GCorge E. Ball. Eds. Pub-lishedt for the Boreal Institute, Universitvof Alberta. by Rverson Press, Toronto,1969. xiv 1266 pp.. ltls. 510.A Laboratory Mlantial of Mlicrotech-
IIi(jlie and Histochemnistry. A. T. SuLmnne-and 13. E. H. Sumn111ner. Blacks ell ScientificPUblications. Oxfor-df, Fnrgland. 1969 (U.S.distribi.tor, Davis, P'hiladelphia). viii + 98pp., illus. Spirial boLund, $3.50.
M\an a.nd Culture in the Late Pleisto-cenie. A Case StuLdy. Richard G. Kleini.Chandler. Sah Francisco. 1969. xxviii +560( pp. illus. $6.95. Chlarndler PuLblicationsin Anthropology Iand Sociology.
T'he Mana lho Rediscovered America.A Biography of Johln Wesley Pomwell. JohniUpton Terrell. Weybright and Talley, NewYork, 1969. vi + 282 pp., ilLIs. $6.95.A Manual on Mlethods for Measuring
Primarv Productioni in Aquatic Environ-mnients. IncluLiding al chalpter onl Bacteria.Based on ia sorking meeting. Verhania-Pallan/a, Italy, May 1965. Richard A.
N9 Vollenwneider, J. F. T'alling, and D. F.) Westlake. Eds. Published for the Interna-
tional Biological Progriamme by Davis,Philadelphiu. 1969. xvi 2 214 pp., illus.
ver Piaper, $8. IBP Handbook No. 12.Nlass Loss froin Stars. PIroceedlings of
oper a colloqulium on astrophysics, Trieste,Itakl. September 1968. Margherita Hack,Ecl. Springer-Verlag, New York; Reidel,Dorirecht, Holl.and. 1969. xii + 348 pp.,ill.s. S 19.50. Astrophysics and Space Sci-
;h sizcs in eiice libralry, vol. 13.Master Mlinds. Portraits of Contempo-
rarxv American Artists and Intellectuials.-On xith Rich.ard Kostelanetz. Macmillan, New
York, 1969. xii + 370 pp. $7.95.porosities Methods for the Nuumerical Solution ofknd thrce Partial Differential Equations. Dale U. von
Rosenber-. Elsevieit, New York, 1969. xii+ 128 pp., illus. $9.50. Modern Analytic
iities with and CoMputLational Methods in ScienceJ 40- 190. and Mathematics, vol. 16.
MrNoon Flight Atlas. Patrick Moore. Randitatchl for McNally, New York, 1969. 48 pp., illus.
$5.95. A Mitchell Beazley Book.jt in eel Muscles, Molecules and Nlovement. An
Essay in the Contraction of Muscles. J. R.Bendall. Elsevier, New York, 1969. xx +2"-0 pp. + plates. $6.75.Naked Ape or Homo Sapiens? John
l e'is and Bernard l'owers. HuLm1anitiesPress. New York, 1969. 136 pp.. illus.$3.50. Teilhard Study library. vol. 4.
Negative Ions and the Mlagnetron. F. M.Pawge and G. C. Goode. Wiiey-Interscience,Necs York, 1969. xiv ±158-pp.I ill'hs.
Dcpt. S 9 S8.9 .Noniiicar Dynamic Elasticity. D. R.
cers of the Urinary System. W. C. Hueper.Yale University Press, New Haven, Conn.,1969. xx + 466 pp., illus. $20.The Other 23 Hours. Child-Care Work
with Emotionally Disturbed Children in aTherapeutic Milieu. Albert E. Triesch-man, James K. Whittaker, and Larry K.Brendtro. Aldine, Chicago, 1969. xviii +240 pp. $7. Modern Applications ofPsychology.The Periglacial Environment. Past and
Present. Based on the Symposium of ColdClimate Environments and Processes, 7thCongress of the International Associationfor Quaternary Research, Fairbanks,Alaska, August 1965. Troy L. Pewe, Ed.McGill-Queen's University Press, Mon-treal, 1969. x + 492 pp., illus. $25.
Phase Diagrams for Ceramists, 1969Supplement. Ernest M. Levin, Carl R.Robbins, and Howard F. McMurdie.Margie K. Reser, Ed. American CeramicSociety, Columbus, Ohio, 1969. ii + 626pp., illus. $30.
Physical Chemistry. A Modern Labora-tory Course. -Hugh W. Salzberg, Jack I.Morrow, Stephen R. Cohen, and MichaelE. Green. Academic Press, New York,1969. xx + 532 pp., illus. $9.50.
Physical Foundations of TechnicalAcoustics. I. Malecki. Translated fromthe Polish edition by Irena Bellert. Perga-mon, New York; PWN (Polish ScientificPublishers), Warsaw, 1969. xxvi + 746pp., illus. $28.
Political Power. A Reader in Theoryand Research. Roderick Bell, David V.Edwards, and R. Harrison Wagner. FreePress, New York; Collier-Macmillan, Lon-don, 1969. xii + 404 pp. Cloth, $12.95;paper, $5.95.The Politics of Weapons Innovation. The
Thor-Jupiter Controversy. Michael H.Armacost. Columbia University Press,New York, 1969. xiv + 306 pp. $10. In-stitute of War and Peace Studies.
Protides of the Biological Fluids. Pro-ceedings of the 16th colloquium, Brugge,Belgium, May 1968. H. Peeters, Ed. Per-gamon, New York, 1969. xvi + 776 pp.,illus. $21.50. Proteins and Related Sub-jects. vol. 16.
Radiotelescopes. W. N. Christiansen andJ. A. Hogbom. Cambridge UniversityPress, New York, 1969. xii + 232 pp.+ plates. $14.50.
Relativity. Ray Skinner. Blaisdell, Wal-tham, Mass., 1969. xii + 340 pp., illus.$12.50.
Residential Water Demand and Eco-nomic Development. Terence R. Lee. Pub-lisi,-ed tor the University of Toronto De-partment of Geography by University oflToronto Press, Toronto, 1969. xiv + 154pp., illus. Paper, $5. University of ToroigtoDepartment of Geography Research Pub-lications, No. 2.
Stochastic Theory and Cascade Proc-esses. S. Kidambi Srinivasan. Elsevier, NewYork, 1969. xvi + 216 pp. $12.50. ModernAnalytic and Computational Methods inScience and Mathematics, vol. 15.The Structure and Chemistry of Solid
Surfaces. Proceedings of the Fourth Inter-national Materials Symposium, Berkeley,June 1968. Gabor A. Somorjai, Ed. Wiley,New York, 1969. Unpaged, illus. $37.50.Inorganic Materials Research DivisionSeries.
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Circie No. 80 cie Reciders' Service CcCrd
1 e("4
Peros skite-Type Conipouiids. Francis S.Gila.sso. Pergamon, New York, 1969. x +21( pp..r i]iiS. 5;9. International Series ofMelonogI.raphs in Solid State Plhvsics. sol. 5.
Stirvivall in Space. YLII i Gagari aIIndVladimir I ebedex. T1ranslated fromil theRLussiaIn by Gaibriella Aradel. Pracger,Nexs York, 1969; cloth. 85.95. BalntaimiNew York, 1969: paper, 95e1. .x + 166 pp.+ plates.
Ilheorv of Problem Solviig. An Ap-proaich to Artificial Initelli-ecncc. Rinman13. Bailcrji. Elsevier. Nes York, 1969. xiv+ 19( pp.. illus. $ 14.5t). M\odier ri Analyticaind C omptattiorlnal MIethiods in Scicnlccand NlItthematics. vol. 6.
T[hernial AiialIsis. Proceedlings of thesecond1t international conlference., 'Worces-tcr, MI a ss., A rirList 1 968. Robert F.Schwxenker, Jr., anid Pauil D. Gar n, Eds.Academic Press, New York. 1969. Vol. 1.listr unmentation, Organic Materials, andPIl\ners (xxiv + 721) pp., ill us. $19. 50)):vol. 2. rioIgaIIic Materials and Physical(heniiistrv (xxviii + pp. 709-1528, illus.S O.O
'Thermial Conductivity. Vol. 1. R. P.T-re. Fd. Academic Press, Ness York.1969. xii 4- 422 pp.. illuis. $19.
TIo the 'Moon. Section 1. The Storx inSou1nld. Six stereo recordines conceivedand prodticed by Michael Kapp. Section 2.IThe Story in Picttic-cts aind 1ext. WarnciR. 7ouutle. Fd. 192 pp., iltlis. 1iiie-I it-eRecordIs. New York, 1 969 (distrihtitor-Little. B3rowsn. Boston). $24.95 tthC set.
'I onjgtues of Coniscience. IN. W, Reid(.Wallker, Ncvw York, 1969. xii 35-1 pp.S7. -5 .
Tranisieiit Performancee of 1 lectricl'owser Svstemis. Pihenoniena in I inmipedNet orlls. Reinhold Rideinberi-_. A1 1.I.P'ress. CNariibtlde lMass.. 1969. xx 4Pp.. Ill1is. S20. Reprinut of the 195( edition.
Utnl'erstand2nr.I)neintistrN. NIl .lilt1lie'arid (iemF II 1 CBCerIC F. IIluist ited1.1t V(Iis)rlllue f)eNrs Beacon, Boston. I 9190. \214 ppu. Ill, S6.
t Tnderstandin(y Quantitative A:ialyski.(he ret .\\Rison. .\ppleion ( ut mitC.-olot Ness )m -k. 1' ')(6. xiii -14 pp.
PltAIin at. S..i)U rbaia Phiininimi \spects of IN :nter 1Iol-
IlitioIl (C0i1itol0 Seati1d11. (a1X iV .1 ( 0Ilu111mihil XII I\ t-, I 't ss " 2\.\ ) ork 1')0.'. \i 11In tisot its ies> Nes r rk 1( i
V estiges of the Nattiral Illistorx of Cre-atiom l. r ( Piribet s. II iiui,mtitie PiessNe; I-mirk: I eieestc I-e Ill\rIi,erIt PI't-ss.eitslter. Itila1 16iI 1)). 9)2 1111. 7. S)
Rte-t iiit of the I44 ed0itionl.%'iolcuc in the (it Illl i li tiz'. ex;ms
V'isnldl TIhlil.kiir.w. Rtidolf Ati-lie .i l; rie-sits of C tlilofrmtm Pre s. 11Btkele\s. 1(6(.
xji 18 p .I llii .IL.V itamini 1 in Mletaholisi ot tihe N erN--
oals Ssteilln. A\ eollflueleCe. NCes Y oil.Nissu irer 1)68. IN,ir-ii-tct \ . IddNc55 *oik dents1m, of Sci.'tenee. N\esYor-\k I')(6)*. 11111S. Piper. S2(1. liMi N/s Ofi/it Nti Yoi .Ii la/crl }S. ci(i .sN Vol.16(. iii. I PP. >14.
W\e Shia.ll te All. A\ listors of, thle 111-ditistl id \Vorkers of the Wor lI. Nlcl sill)rili(lssk (O)ridtidr-umdc. ( hica'a,. 196i)
-IS ppP. lite,s. S1 2 .(1
MTii , Vol-. 166
Two ModelsMlodels 351 and 352 are fast and slow sersions of the same pump design. Eachniodel quickly p)raydes nineteen different flow rates with any of six different sizesyringes, Flow rates tor the mnidel 351 are from 0.15 ml/min to 60 ml/min; model352 gives same rates in ml/hr. There is an average 1.4 ratio between adjacentspeeds. thus providing the mcst often used flow rates in close, discrete steps.Rates ate cickly achieved by niaking just Lwo dial settings: syringe size andf lov raiteHolds 3 SyringesBoth pumps come complete and require no accessories. They are quick and easyto set up and easy to operate. Their syringe holders accept up to three syringesat a time and hold all type syringes from microliter size to 100 cc capacity.Reproducible Flow RatesThe pumps can be used to infuse or withdraw fluids at the same highly repro-ducible flow rates. Each has a flow rate range broad enough to answer a multitudeof needs. Price S375. Send for complete technical information.
