RECENT WORK IN AGRICULTURAL SCIENCE. 



AGRICULTUEAL CHEMISTRY— AGROTECHNY. 



Handbook of biochemical methods, edited by E. Abderhalden (Handbuch 

 der Biorftemischen Arbeitsmethodcn. Berlin and Vienna, 1912, vol. 5, pt. 2, pp. 

 XV-\-673-lJ,67, pi. 1, figs. 130).— This portion of the work deals with the detec- 

 tion of poisons by chemical methods, the transplantation of tissues, the tech- 

 nique of cultivating tissues in vitro, methods for the biochemical examination 

 of the soil, methods for metabolism tests with micro-organisms, the gasometric 

 determipation of primary aliphatic amino-nitrogen and its use for physiologi- 

 cal-chemical investigations, the analysis of proteins for determining the char- 

 acteristic groups of various amino acids, the Zuntz method of gas analysis, new 

 apparatus for metabolism experiments, ash analysis, ultra-filtration, tables for 

 the preparation of solutions with definite hydrogen ion concentrations, methods 

 for biological micro-analysis, metliods for studying intermediary metabolism, 

 methods for the biochemical study of plants, quantitative micro-elementary 

 analysis of organic substances, capillary analysis, biochemical and chemother- 

 apeutic methods for tryjianosomes, and reagents for detecting the more impor- 

 tant biological compounds. 



An introduction to the chemistry of colloids, V. I'oschl, trans, by H. H. 

 Hodgson (London, 1910, pp. lUf). — ^An English edition of the German work 

 previously noted (E. S. R., 24, p. 120). 



Introduction to colloid chemistry, V. Poschl (Einfuhrung in die Kolloid- 

 chemie. Dresden, 1911, 3. ed. rev., pp. 80). — A third edition of the work above 

 referred to. 



Physical chemistry of the cell and tissue, R. Hobee (Physikalische Chemie 

 der ZcUe und der Gewehe. Lelpsic, 1911, 3. ed., pp. XT +671, figs. 55; rev. in, 

 Biol. Centbl., 32 (1912), No. J,, pp. 2.'i3-250).—A third revised and enlarged edi- 

 tion of this work on physical chemistry as applied to physiological problems. 



Chemistry of the cell, W. J. Gies et al. (Biochem. Bui., 1 (1911), No. 1, 

 pp. 65-93). — Those are abstracts of communications to a symposium on the 

 chemistry of the cell, held at Columbia University, including intracellular water, 

 salins, carbohydrates, lipins, proteins, extractives, and enzyms, and factors in 

 immunity. 



In regard to the chemistry of chlorophyll, M. S. Tsvett (Rev. G6n. Sci., 

 28 {1912), No. Ji, pp. Uil-UiS). — This article gives a general view of the present 

 status of the chemistry of chlorophyll. 



Yearbook of chemistry, edited by R. Meter (Jahrb. Chem., 20 (1910), pp. 

 XII+568). — This is a report of the more important progress made in the field 

 of pure and applied chemistry for the year 1910. 



Investigations in regard to the precipitation of proteins, A. J. J. Vande- 

 velde (Bui. Soc. Chini. Belg., 25 (1911), No. If, pp. 166-173). — Continuing pre- 

 vious work (E. S. R., 25, p. 709), the author now reports further results of 



51193°— 12 2 * ^^^ 



