Back MatterSource: The Scientific Monthly, Vol. 49, No. 1 (Jul., 1939), pp. v-viPublished by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/16968 .

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THE SCIENTIFIC MONT'HLY-ADVERTISEMENTS v

Adhventure Shop of Anthony Fiala Complete Equipment for

Explorers, Scientists, Engineers, Hunters and Travelers

L I~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~; We Have Equipped Many Expeditions from the Poles to the Equator

Some of these exploring parties we equipped with practically everything they needed from engineering instruments to rifles, ammunition and food. Our tents, made of Equatorial Water- proof Cloth, have stood the sun of the tropics and the freezing blasts of the Polar regions.

Let us furnish estimates-write us your wants.

The Paulin System Altimeter The Paulin system is the first real improvement in instruments

of this type in over seventy years With a Paulin altimeter accurate surveys of elevations can be made with the minimum of

expense as to apparatus and labor. The Paulin method is particularly valuable for recon- naissance surveys. For example; an engineer who specializes in the placing of sewers makes his preliminary survey now by Paulin altinmeter. Previously he used to send a man with an axe, another with a rod, and an instrument man with a level to make these surveys. Now he sends one man with a Paulin altimeter and has a recording barograph in his office or at the station from where his survey starts, to take care of variations of atmospheric pressure. By this method he can put in a bid in one-third the time and at one-ninth the cost of any other engineer using the level and rod method.

Two Army engineers made a survey of over one-thousand miles, each one using a Paulin altimeter. The method used was for one of the men to stay at the station and after comparing watches the other officer started on his hike for a new station fifteen or twenty miles away. Every half hour he would stop and observe his altimeter, knowing that his comrade at station #1 was doing the same. When he arrived at station #2 he would make a final observation and stay over night. The following day he made observations of his altimeter every half hour. His comrade at station #1 would leave that station and march toward station #2 making his half hour observations during the march as his comrade had done the day before. On arriving at station #2 the two men would stay together over night. In the morning the first officer would start out again for station #3 and so the march would continue, each man alternately marching and stopping at the station until the work was completed. By this method one checked the other and the variation in barometric pressure was taken care of. It is needless to say that they made an excellent and accurate survey.

EASTERN REPRESENTATIVE: The Paulin Altimeter

the most accurate aneroid used for leveling by engineers and geologists. FIALA OUTFITS, Inc.

ANTHONY FIALA, Pres. 10 Warren Street, New York City

TELEPHONE CORTLANDT 7-4725 CABLE "AFIALA" NEW YORK

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vi T'HE SCIENTIFIC MONTHLY-ADVERTISEMENTS

COLD SPRING HARBOR Symposia on Quantitative Biology

VOLUME VI

PROTEIN CHEMISTRY The collected papers read at the Symposium held during the past summer at The Biological Laboratory, Cold Spring Harbor, and the discussion of each.

Hydrogen ion dissociation curves of proteins-R. KEITH CANNAN Electrically charged groups of proteins-EDWIN J. COHN Dielectric properties of protein solutions-J. L. ONCLEY, J. D. FERRY, and J. SHACK Proteins as amphoteric electrolytes-DAVID 1. HITCHCOCK Keto acids and amino acids-ROBERT M. HERBST Raman spectra and structure of amino acids and peptides-JOHN T. EDSALL Protein structure and proteolytic enzymes-JOSEPH S. FRUTON Chemistry of protein structure-CARL NIEMANN Metabolism of proteins in green leaves-H. B. VICKERY Comparative biochemistry of proteins-RTCHARD J. BLOCK Mucopolysaccharides and glycoproteins-KARL MEYER Composition of tissue proteins-SAMUEL GRAFF and L. G. BARTH X-ray study of proteins-W. T. ASTBURY and FLORENCE 0. BELL Is there a protein fabric?-DOROTHY M. WRINCH Protein denaturation-HENRY B. BULL Protein denaturation-A. E. MIRSKY Denaturation by high frequency radiations-THUGo FRICKE Protein monolayers-IRVING LANGMUIR Protein films at the oil-water interface-J. F. DANIELLI Diffusion of proteins-HANS NEURATH Physical chemistry of prolamines-J. W. WILLIAMS and C. C. WATSON Double refraction of flow in protein solutions-JOHN W. MEHL Electrokinetic aspects of protein chemistry-LAURENCE S. MOYER Optical activity of proteins and amino acids-DWIGHT C. CARPENTER Ultrafiltration of proteins-PIERRE GRABAR Protein hormones-ABRAHAM WHITE Insulin and the protein hormones-VINCENT DU VIGNEAUD Prosthetic group and protein carriers-KURT G. STERN Solubility of crystalline proteins-J. STEINHARDT Crystalline pepsinogen and pepsin-ROGER M. HERRIOTT Solubility curves of proteins-M. KUNITZ and J. H. NORTHROP Phase rule study of serum proteins-ELOISE JAMESON Ultracentrifugal study of macromolecules-RALPH W. G. WYCKOFF Protein constitution and immunological behavior-MICHAEL HEIDELBERGER Immunochemical methods for identification of serum proteins-FORREST E.

KENDALL Chemical nature of amphibian organizer-L. G. BARTH and SAMUEL GRAFF

391 pages, including numerous text-figures and tables, and an index. Price $4.50. Orders should be sent to THE BIOLOGICAL LABORATORY, LONG ISLAND BIOLOGICAL ASSOCIATION, COLD SPRING HAR- BOR, L. I., N. Y.

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