VETERINARY SCIENCE AND PRACTICE. 389 



is summarized and a similar comparative test of mangels and sugar beets for 

 milk production is reported. The experiment included 4 co\a's and lasted 4 weeks. 

 " Everj'thing considered, these experiments indicate that there is very little, if any, 

 difference between mangels and sugar beets as foods for stimulating the flow of milk. 

 It must be remembered, however, that these experiments have no bearing upon the 

 relative value of these foods for maintaining life or producing fat." 



Mangels v. sugar beets for milk production, G. E. Day ( Ontario Agr. Col. and 

 Expt. FuTin Bui. 110, pp. 46). — An account is given of 2 comparative tests of mangels 

 and sugar beets for milk production previously reported (E. S. R., 11, p. 688; 12, 

 ].. .388) . 



Milking record experiment, J. A. ^Mirr.w {Ann. Rpt. Field Expls. Agr. Dept. 

 Lhiiv. Col. Wales, 1899, pp. 26-30). — Records of 5 herds of 5 cows each for 3 months 

 were obtained for the purpose of comparing Welsh Black and Shorthorn breeds of 

 cattle for dairy purposes. The results, while not considered conclusive, showed a 

 much larger yield of milk in favor of the Welsh Black breed. 



Concerning tlie cows' milk in Varna, Bulgaria, C. Strzyzowski {Oeslerr. Chem. 

 Zig., 3 (1900), Xo. 7, pp. 157, 158) . — The author reports analyses of 7 samples of milk. 

 He states that nothing corresponding to a modern milk control exist** in Bulgaria 

 and the milk supply has been little studied. Where a control exists it usually con- 

 sists in determining the specific gravity and testing for the presence of starch or brain 

 matter, although adulterations of this kind are said to occur very rarely. 



On the variability of the dry matter of milk and its value for judging 

 market milk, A. Reixsch and H. LtJHRiG {Zisckr. Untersuch. Nahr. v. Genussmtl., 3 

 {1900), Xo. 8, pp. 521-531). 



The value of a regulated milk control for cities, A. L.\mb {Ztsclir. Untersuch. 

 Xahr. v. Gennmntl., 3 {1900), Xo. 7, pp. 472-475, dgm. 1). 



Milk and milk bacteria, S. Sekkowsky {Milch und, ihre Bakterien. Wa7'sau; 1900, 

 pp. 129; rev. in Ztschr. Untersuch. Xahr. u. Genussmtl., 3 {1900), Xo. 8, p. 591). 



Lactic acid bacteria, M. E. McDonnell {Inaug. Diss., Kiel, 1899, pp. 60, pis. 3). — 

 This contains the results of extended observations and investigations on the growth 

 of lactic-acid bacteria in different media, milk fermentations, and the morphology 

 and physiology of lactic-acid bacteria, and their maximum, minimum, and optimum 

 temperatures. A classification is given of the different lactic-acid germs and the 

 propagation of pure cultures for dairy ])urposes is considered. 



The coagulation of milk by rennet, Ditclaux {Ind. Lait., 25 {1900) , Xos. 30, pp. 

 233, 234; SI, pp. 241, 242; 32, pp. 249, ;?5C).— The action of rennet on the different 

 milk constituents is discussed. 



EfiPect of sewage water on renneted milk, G. 8. Thomson {Jour. Agr. and Ind. 

 South Australia, 3 {1900) , Xu. 11, pp. 911-914, .figs. 3). — Sewage Avater obtained from a 

 drain running from a cheese-making room and added to pasteurized milk jiroduced 

 a stringy and gassy curd. This trouI>le was observed in 2 factories. 



The effect of churning on fat globules, G. A. Flickinger {Tennessee Sta. Bpt. 

 1899, pp. 34-36, Jig. 1) ■ — A popular discussion. 



The normal bacterial invasion of the cow's udder, V. A. Moore {Proc. Soc. 

 Prom. Agr. Sci. 1899, pp. 110-113). — The author calls attention to the Ijacterial inva- 

 sion of the udder as one of the sources of milk contamination, basing his discussion 

 of the subject mainly on investigations previously noted (E. S. R., 10, p. 1094; 12, 

 p. 184). 



VETERINARY SCIENCE AND PRACTICE. 



The problem of infection and immunity, A. D. Pawlowskt 



{Ztschr. Hyg. u. InfectioTiskrmik., 33 {1900), No. 2,2)p. 261-31£).—ln 

 this article the author reports the results of extensive experiments 



