DAIRY FARMING DAIRYING AGROTECHNY. 471 



pure milk fat separated by meltius, the elementary composition was 74.78 per 

 cent carbon and 11.46 per cent hydrogen. 



On the spontaneous separation of a casein compound from milk, L. Preti 

 (Ztschi: PJnjsiioL Chcm., 53 (1907), No. 3-5, pp. J,W-.',26).—lu milk preserved a 

 year by the addition of chloroform, a rich white precipitate formed in the 

 i)ottom of the flask without changing the reaction of the milk. Upon investi- 

 gation this precipitate was considered to be a mixture of calcium phosphate and 

 calcium caseiuate. The author could not determine the nature of the casein, 

 whether acid casein or rennet Ciisein, and therefore could not decide whether 

 the gradual separation of the precipitate occurred as a purely physical phenom- 

 ena or under the action of a ferment. 



The action of dilute acids upon casein, L. L. and D. D., Van Slyke (Amer. 

 Chcm. Jour., 38 (1907), No. .'/, pp. 383--'t56, figs, i-',).— This has already been 

 abstracted from another source (E. S. K., 10, |). 17.3). 



The hydrolysis of the sodium salts of casein, L. L. and I). 1). Van Slyke 

 (Amrr. CJirm. Jour., 38 (1907), No. 5, t)p. 619-626, figs. ;2).— This has already 

 been abstracted from another source (E. S. E.. 10, p. 174). 



A contribution to knowledge regarding goat's milk and butter, H. Sprink- 

 MEYER and A. Fijrstenberg (Ztschi: Untcrsuch. Nahr. a. Gcnussmtl., IJf (1907), 

 No. 6, pp. 388-391).— The milk of each of 10 goats at the beginning of the lac- 

 tation period was tested separately. The goats were milked at morning, noon, 

 and evening. In the average of the data for 1 day the quantity of milk for 

 the different milkings was respectively OGO, .522, and 668 gm., the lactodensi- 

 meter reading at 1.5° C. was 30.7, 20.0, and 31.1, and the fat content was 3.01, 

 4.05, and 4.38 per cent. In the butter made from the milk the refractive index 

 at 40° C. ranged for the different animals from 41.1 to 44.3, the Reichert-Meissl 

 number from 20.3 to 29.1, the saponification number from 226.1 to 242.4, and 

 the iodin absorption number from 26.0 to 38.0. 



Dictionary of dairying in all countries, B. Martiny ( Wortcrbuch dcr MiJch- 

 tcirtschaft ailer Lander. Leipsic, 1907, pp. XI-\-l.'i2). — A collection of popular 

 expressions and technical terms pertaining to dairying and also to cattle breed- 

 ing in use in different countries, with explanations of their meanings. 



Review of the work of the 1906-7 season, I). CunniE (Nrip Zeal. Drpt. Agr., 

 Dairg Dir. Bui. 10, pp. 52, pis. 13; Ann. Rpt. 1907, pp. 5-22).— The purpose of 

 this publication is merely to " furnish a general outline of what has been done 

 by the division, with some observations dn matters affecting the dairy industry." 



Handbook of information regarding milk, H. Rievel (Handhucli dcr 

 Milchkiindc. Hannover, 1907, pp. X+376, figs. 35). — In this volume, which is 

 virtually a text-book on milk, the author presents a considerable amount of 

 data and other information of value to those interested in the ])roduction and 

 distribution of milk. The book is divided into several sections, which discuss, 

 respectively, the itroperties of normal milk as affected by differences in breed of 

 cattle or in individuality-, by age, feeding, disease, etc. ; the dangerous qualities 

 of milk owing to diseases of the cows ; measures for the prevention of the dan- 

 gers in the use of milk, such as sterilization and pasteurization ; the use of milk 

 as a food for infants and children, with special consideration of the various 

 jnethods of preparing the milk ; and various topics concerned in milk control. 

 An appendix gives a number of examples of police ox'dinances for the regulation 

 of the milk industry in several cities in Germany. 



American milk and milk standards, W. Frear (Proc. Conv. Nat. Assoc. 

 State Dairy and Food Depts., 10 (1906), pp. 172-19Jf). — "The purpose of this 

 paper is to present a few facts concerning the composition of American milk 

 in its relation to the chemical limits fixed in American legal standards, and 

 especially those of the United States standard." 



21767—08 6 



