610 EXPEEIMENT STATION RECORD. 



cMorie acid per liter, and shaken. When the layers have cleared, the chloroform 

 layer is drawn into another separating funnel containing 200 cc. of acidified 

 sodium chlorid solution, shaken, drawn off, from 4 to 5 drops of alcoholic 

 phenoiphthaleiu solution added, and titrated with a standard solution of sodium 

 ethoxid, which is prepared by dissolving 2.3 gm. of cleansed metallic sodium in 

 1 liter of absolute alcohol. The volumetric solution may be standardized 

 against pure benzoic acid in chloroform. 



Beport of the Java Sugai' Station for the year 1910 (Jaarver. Proefstat. 

 Java Suikerindus., 1910, pp. 79, tables 2). — This is a detailed report in regard 

 to administrative and scientific work at the station for the year 1910. 



Distribution of the phosphoric acid in milk, F. Bordas and F. Touplain 

 (Ann. Falsif., // (1911), No. 31, pp. 229-231; abs. in Analyst, 36 (1911), No. 1,2',, 

 p. 3-'f5). — rreviously noted from another source (E. S. R., 25, p. 312). 



In regard to the historical development and the principal signifi.cance of 

 biological milk investigations from the chemical, hygienic, and forensic 

 standpoint, K. Schern (Berlin. Ticrarztl. ^Wehnschr., 21 (1911), No. Jf2, pp. 

 761-767). — This is a critical discussion of almost all of the methods thus far 

 proposed for detecting milks of pathologic origin. 



The technique of the milk-rennet inhibition test, K. Schern (Berlin. 

 Tierarztl. Wchnschr., 27 (1911), No. 38, irp. 700-703, figs. 3),— The author here 

 gives in detail the technique of his method, the results with which have already 

 been noted (E. S. R., 21, p. 707). 



The technique of the milk-rennet inhibition test (Berlin. Tierarztl. 

 Wchnschr., 27 (1911), No. 39, p. 710). — A correction in regard to some typo- 

 graphical errors which occurred in the article noted above. 



The determination of the specific gravity of small quantities of milk, 

 A. Kreidl and E. Lenk (Biooliem. Ztschr., 35 (1911), No. 1-2, pp. 166-168).— 

 Assuming that ttiB fat of milk is not readily extracted or dissolved by the 

 ordinary fat solvents alone because the casein apparently forms a membrane 

 over the globules, the authors prepared mixtures consisting of benzene and 

 chloroform, benzene and carbon tetrachlorid, etc., which had the specific 

 gravity of the average normal milk, and placed 1 drop of the milk on a por- 

 tion of the mixture. This drop would either float upon the surface or sink, 

 according to its specific gravity. 



The detection of benzoic acid and salicylic acid in milk, E. Philippe (Mitt, 

 Lehensm. Untersuch. u. Hyg., Sclnoeiz. Gsndhtsamt., 2 (1911), No. 6, pp. 377- 

 383). — This discusses Breustedt's reaction (E. S. R., 11, p. 419), which utilizes 

 Ritthausen's principle, viz, copper sulphate for precipitating the proteins of 

 milk, and acidified ether for extracting the salicylic or benzoic acid from the 

 filtrate therefrom. Jonescu's (E. S. R., 21, p. 523) and Mohler's methods for 

 detecting benzoic acid (E. S. R., 25, p. 503) were also used. The usual methods 

 for salicylic acid were found satisfactory. 



For differentiating various kinds of butter, F. Schaffer and T. von Fel- 

 LENBERG (Mitt. Lchensm. Untersuch. u. Hyg., Schweis. Gsndhtsamt., 2 (1911), 

 No. //, pp. 209-220). — The purpose of the tests reported was to determine how 

 butter which is prepared from pasteurized cream behaves in regard to the 

 various enzym reactions (reductase, oxidase, etc.), and furthermore to see if the 

 ordinary butter can be distinguished from centrifuged whey butter and Yor- 

 bruch butter on the basis of the composition of the ash, particularly calcium. 



Detection of coconut oil in butter, A. Hepnee (Ztschr. Untersuch. Nahr. u. 

 Gemissmtl., 21 (1911), No. 12, pp. 758-760; abs. in Jour. Soc. Chem. Indus., 30 

 (1911), No. 15, pp. 97 Jf, 975). — When cows were fed on beet leaves the com- 

 position of the butter fat was such that when examined by Fendler's second 



