DAIRY FARMING DAIRYING. 173 



keeping quality do not necessarily run parallel because it is the qualitative 

 rather than the quantitative bacterial content that detennines keeping quality. 

 It follows that our quantitative method for determining the infection in eggs 

 does not fui-nish us a very reliable index to the influence of various factors 

 upon the keeping quality of our eggs. 



" Summer eggs show more bacteria than fall eggs, and as shown in Bulletin 

 ISO [E. S. R.. 27. p. 73] also more bacteria than spring eggs. The ratio of 

 coagulable to uncoagulable nitrogen did not reveal any appreciable influence 

 of the factors investigated upon the keeping quality of the eggs examined. 

 No grass eggs were laid by a number of hens whose diet consisted chiefly of 

 alfalfa, nor could any green pigment-forming bacteria be detected in such 

 eggs." 



Attention is called to recent studies made by the Connecticut Storrs vStation 

 (E. S. R., 31. p. 171) in which a much lower bacterial infection was obtained. 

 It is stated that this discrepancy can not be accounted for as being due en- 

 tirely to contamination during the manipulation of the cultures. A bibliography 

 is included. 



Farm poultry in Missouri, H. L. Kempstes {Missonri Bd. Agr. Mo: BiiL, 12 

 (1914), No. 7, pp. 98, figs. 52). — ^A general account of the methods of feeding, 

 care, and management of poultry, with special reference to Missouri condi- 

 tions, and including artificial incubation, brooding, care of market eggs, and 

 prevention and cure of poultry diseases. 



The encyclopedia of the poultry yard, Y. Shaw (London and New York, 

 1913, pp. IX-\-ns. pis. 16, figs. 21). — An encyclopedia on breeds of poultry and 

 general poultry topics. 



Ostrich breeding and feather handling in South Africa and other coun- 

 tries, H. HiNTZE (Tropenpflanzcr, IS {19U), Nos. 5, pp. 259-271; 6, pp. 323- 

 331; 7, pp. 881-392). — A general account of the distribution and commercial 

 importance of the ostrich in South Africa and elsewhere, and a discussion of 

 methods of management for commercial purposes. 



Rabbit breeding industry in Germany, A. R. Thomson {Daily Cons, and 

 Trade Rpts. [U. S.], 17 (191Jf), No. 171, pp. 454, //55).— It Is Stated that the 

 rabbit raising industry in Germany has received a marked impetus during the 

 past few years owing to governmental encouragement. During the past five 

 j^ears the demand for rabbit meat caused the price to increase from approxi- 

 mately 7.1 to 23.84 cts. per head. 



DAIRY FARMING— DAIRYING. 



[Bibliography of dairy literature], R. AY. Raudnitz and W. Grimmer (Arb. 

 Gel). Milch ir. u. Molk. I'rajis, 1913, I, No. 17, pp. 4'^)- — This is a general review 

 of articles on the science and practice of dairying imblished during a por- 

 tion of the year 1913. 



A dairy laboratory guide, H. E. Ross {New York, 1914, pp. T'l-fS-J, pi. 1). — 

 General instructions for use in the dairy laboratory. 



Feeding of dairy cows, N. Athanassof (Rev. Vet. c Zootcch., 1 {1911), 

 No. 3, pp. 162-174, pis. 4; 2 {1912), Nos. 1, pp. 58-65, pis. 2; 3, pp. 102-114; 

 4 {1914), Nos. 1, pp. 73-86; 2, pp. 127-143; 3, pp. 174-188) .—This is a general 

 exi>osition on the theory of the feeding of dairy cows, including a discussion of 

 the physiology of milk secretion, the influence of individual and breed upon 

 milk yield, and the influence of methods and time of milking. The author out- 

 lines the main principles of the Kellner theory of feeding and feed require- 

 ments for milk production. There is included a discussion of the feeding value 



