July 2, 1915] 



SCIENCE 



37 



Eobert E. Tatnall, 5 years. Ex-officio : Ernest 

 Merritt, President, American Physical Soci- 

 ety; Alfred D. Cole, Secretary, American 

 Physical Society. 



Member of General Committee, R. A. Milli- 

 kan, Chicago. 



W. J. Humphreys, 

 Secretary, Section B 



NEW OBLEANS MEETING— AMEEICAN 

 CHEMICAL SOCIETY 



TITLES AND ABSTRACTS OP PAPERS 



Opening address by A. D. Little, "The Indus- 

 trial Eesources and Opportunities of the South." 

 Charles S. Ash: Contributions of the Chemist to 



the Wine Industry. 

 J. B. F. Herreshofp: Contributions of the Chem- 

 ist to the Copper Industry. 



E. T. Bedford: Contributions of the Chemist to 

 the Corn Products Industry. 



James Lewis Eake: Contributions of the Chemist 

 to the Asphalt Industry. 



DAvm Wesson: Contributions of the Chemist to 

 the Cotton-seed Oil Industry. 



G. S. Brown : Contributions of the Chemist to the 

 Cement Industry. 



W. D. HORNE: Contributions of the Chemist to the 

 Sugar Industry. 



Sidney Mason: Contributions of the Chemist to 

 the Incandescent Gas Mantle Industry. 



Franklin W. Hobbs: Contributions of the Chem- 

 ist to the Textile Industry. 



H. Walker Wallace: Contributions of the Chem- 

 ist to the Fertilizer Industry. 



F. R. Hazard: Contributions of the Chemist to the 

 Soda Industry. 



William H. Teas: Contributions of the Chemist 

 to the Leather Industry. 



John A. Wesener and George L. Teller: Con- 

 tributions of the Chemist to the Flour Industry. 



Gaston D. Thevenot: Contributions of the Chem- 

 ist to the Brewing Industry. 



E. I. Bentley: Contributions of the Chemist to 

 the Preserved Foods Industry. 



Wm. p. Mason: Contributions of the Chemist to 

 the Potable Water Industry. 



E. C. SCHUPPHAtJS: Contributions of the Chemist 

 to the Celluloid and Nitrocellulose Industry. 



A. A. Houghton: Contributions of the Chemist to 

 the Glass Industry. 



F. L. Moore : Contributions of the Chemist to the 

 Pulp and Paper Industry. 



Public address to the people of New Orleans, by 



Bernhard 0. Hesse, "The Chemists' Contribution 

 to the Industrial Development of the United States 

 — A Eecord of Achievement. ' ' 



The above papers have been printed in full in 

 the April issue of the Journal of Industrial and 

 Engineering Chemistry. 



division op agriculture and pood chemistry 



Floyd W. Robinson, chairman 



Glen F. Mason, secretary 



E. H. S. Bailey and W. S. Long: On the Compo- 

 sition of the Seeds of Martynia Louisiana {Uni- 

 corn or Devil's Claws). 



This plant, which grows wild through the central 

 west and especially in the dry climate of western 

 Kansas, Colorado and New Mexico, has been in- 

 vestigated with reference to utilizing the oil con- 

 tained in the seed. It has been found that this 

 seed contains over sixty per cent, of a bland oil, 

 24.21 per cent, of protein and 4.55 per cent, of 

 starch. An examination of the oil shows that it 

 compares favorably with some edible oils, espe- 

 cially cotton-seed oil. The authors suggest that 

 since the plant is so well adapted to a dry climate, 

 experiments should be made to determine whether 

 it may not be profitably cultivated as an oil-bear- 

 ing plant. 

 Edward Gudeman: Action of Milk on Colloids. 



W. D. BiGELOW and F. F. Fitzgerald: The Re- 

 lation of the Befraction, Specific Gravity and 

 Solids in Tomatoes and Tomato Pulp. 

 As a result of the examination of a considerable 

 number of fresh and canned tomatoes, and of pulps 

 made up under knovm conditions, tables have been 

 constructed to facilitate analytical work. The 

 generalizations given below are within the limits 

 of analytical error. The filtrate referred to is ob- 

 tained by throwing a sample of tomato pulp, or 

 crushed tomato product, on a folded filter. Raw 

 tomatoes should be cooked previously in a reflux 

 condenser. The solids are determined by drying 

 in vacuo at 70° and under atmospheric pressure at 

 the temperature of boiling water. 

 Solids of pulp in vacuo = solids of nulp at atmos- 

 pheric pressure X 1.085, 

 Solids of pulp in vacuo = solids of filtrate in 



vacuo X 1.125, 

 Solids of filtrate in vacuo = solids of filtrate at 

 atmospheric pressure X 1.12. 

 From the specific gravity of the filtered liquid 

 at 20° C, the per cent, of solids of the pulp (not 

 of the filtrate) may be ascertained from the Wind- 

 ish wine table.i The figure 0.05 should be de- 



1 Table V., Bull. 107, Bureau of Chem. 



