EXPERIMENT STATION RECORD. 



Vol. 41. Abstkact Number. No. 9. 



RECENT WORK IN AGRICULTURAL SCIENCE. 



AGRICULTURAL CHEMISTRY— AGROTECHNY. 



First report on colloid chemistry and its industrial applications (Brit. 

 Assoc. Adv. iS'eJ., Rpt. Colloid Chem. [etc.], 1 (1917), p. 86'). — This report is the 

 outcome of the work of a coiniuittee appointed by tlie chemical secth^n of the 

 British Association for the Advancement of Science, for the purpose of com- 

 piling information regarding the advances which have been made in colloid 

 chemistry, with special reference to industrial processes. Two methods of 

 classification have been adopted : First, a classification according to the nature 

 of the property, ijrinciple, or phenomenon concerned, based on the recognized 

 divisions of the science of colloid chemistry ; and second, a classification in 

 terms of the various technical processes themselves. 



In the present report one subject only has been considered according to the 

 first classification, namely : The Viscosity of Colloid Systems, by E. Hatschek. 

 The subjects dealt with under the second classification, and contributors thereto 

 are as follows : Colloid Chemistry of Tanning, by H. R. Proctor ; General Re- 

 view and Bibliography of Dyeing, by P. E. King; Colloid Chemistry in the 

 Fermentation Industries, by A. J. Brown ; Rubber, by H. P. Stevens ; Colloid 

 Chemistry of Starch, Gums, Hemicelluloses. Albumin, Casein, Gluten, and Gela- 

 tin, by H. B. Stocks ; Colloids in the Setting and Hardening of Cement, by 

 C. H. Desch ; Nitrocellulose Explosives, and Celluloid from the Standpoint of 

 Colloidal Chemistry, by E. R. Chrystall ; and Colloidal and Capillary Phenomena 

 in their Bearing on Physiologj' and Biochemistry, by W. Ramsden. 



In a few of these reports bibliogi-aphies of the literature alone are given, and 

 in all an attempt has been made to cover the literature to date (1917). 



Second report on colloid chemistry and its general and industrial applica- 

 tions, F. G. DoNNAN ET AL. (Bvit. Assoc. Adv. ScL, Rpt. Colloid Chem. [etc.], 2 

 (1918), pp. 172; also in Rpt. Brit. Assoc. Adv. Sci., 1918, Sect. B, pp. jr.^).— This 

 report follows the general lines of the report noted above. The subjects and 

 authors are as follows : Report on Peptisation and Precipitation, by W. D. Ban- 

 croft ; Emulsions, and The Liesegang Phenomenon, both by E. Hatschek; Elec- 

 trical Endosmose, by T. R. Briggs; Colloid Chemistry in the Textile Indus- 

 tries, by AV. Harrison ; Report on the Part Played by Colloids in Agiicultural 

 Phenomena, by E. J. Russell ; Sewage Purification with Reference to Colloid 

 Chemistry, by E. Ardern ; Colloid Problems in Dairy Chemistry, by W. Clayton ; 

 Colloid Chemistry in Physiology, by W. 'M. Bayliss; and The Administration 

 of Colloids in Disease, by A. B. Searle. 



Crystallography, E. T. Wherry and E. Yanovsky (Jour. Wash. Acad. Sci., 

 9 (1919), No. 17, pp. 505-513, figs. 2). — Crystallographic measurements of mor- 



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