ANIMAL PEODUCTIOlSr. 69 



those of superior conformation was found to contain more hemoglobin than in 

 stall fed or inferior animals. 



Economic importance of corn silag-e in southern beef production, R. S. 

 Curtis (North Carolina Sta. Rpt. 1912, pp. Jfl-^G). — A r^sumS of experiments at 

 North Carolina and other stations, showing that in beef production silage is an 

 important factor in cheapening the ration. 



A contest in wool, C. S. Plumb (Country Gent., 78 (1913), No. 10, p. $45, 

 fig. 1). — A brief historical account of public shearings in the United States. 

 The educational features of such demonstrations are pointed out, and the method 

 of scoring contests at the Ohio State University is given. 



The Mocha goatskin trade of Red Sea region, W. H. Schulz (Daily Cons. 

 and Trade Rpts. [U. 8.], 16 (1913), No. 77, pp. 49-51).— This is a report of the 

 amount, value, and character of various grades of goatskins exported from Aden 

 to the United States. 



The utilization of feeding stuffs by the zebu, C. Pucci (Agr. Colon. [Italy], 

 7 (1913), No. 1, pp. 11-28, figs. 2). — Digestion coefficients were obtained with 

 1 bull and 1 zebu on a ration of hay and on hay and peanut cake. The differ- 

 ences between the 2 animals were slight, except in the case of ether extract, 

 which was much better utilized by the zebu. 



Pork production, J. I. Thompson (California Sta. Circ. 96, pp. 2). — Brief 

 notes on the type of the hog market demands, and on the selection of breeding 

 stock, and methods of feeding hogs, are given. 



Cooperative pig-fattening establishment for TJlm and Neu Ulm, von 

 Braun (Landw. Jahrb. Ba^ern, 2 (1912), No. 3, pp. 121-167, fl^s. 5; abs. in 

 Intemat. Inst. Agr. [Rome], Bui. Bur. Agr. Intel, and Plant Diseases, 3 (1912), 

 No. 6, pp. lS6Jt-1366) . — An account of the methods of a large pig-breeding co- 

 operative association. Young pigs are fattened on fresh barley, meat meal, 

 and fish meal until they reach the live weight of about 240 lbs. For the pro- 

 duction of 100 lbs. of live weight it requires about 350 lbs. of fresh barley and 

 30 lbs. of the meat meal and fish meal. About 22 weeks are required for 

 fattening, and the cost of the food ranges from 61.23 marks (about $14.57) 

 to 68.82 marks. 



Biological searchlight on race-horse breeding, J. B. Robertson ( Blood.'^tock 

 Breeders' Rev., 2 (1913), No. 1, pp. 7-16, figs. 3). — This contains data on breed- 

 ing records, mortality of twins, and other data connected with twinning in 

 Thoroughbred brood mares. 



The Arabian national stud book (Washington, D. C, 1913, vol. 1, rev. ed., 

 pp. 88, pis. 13). — Besides a list of American Arabian horses, this contains notes 

 on the history of the Arabian horse and information relating to the Arabian 

 Horse Club of America. 



The home poultry book, E. I. Fakeington (New York, 1913, pp. 172, pis. 

 32). — The information in this book is based largely on personal experience 

 and on what has been learned by visits to large poultry plants. It Is intended 

 for those who keep poultry on a small scale. 



Castration in relation to the secondary sexual characters of Brown Leg- 

 horns, H. D. GooDALE (Amer. Nat., 47 (1913), No. 555, pp. 159-169, figs. 3).— 

 In castration of male Brown Leghorns all characters of the cock were retained 

 by the capon, with the exception of comb character. The comb resembled that 

 of a pullet just before beginning to lay. Ovariotomy caused the female to as- 

 sume some of the feather characteristics of the male. 



On the origin of double-yolked eggs, O. Glaser (Biol. Bui. Mar. Biol. Lad. 

 Woods Hole, 24 (1913), No. 5, pp. 175-186, figs. ,5).— Among the striking 

 features of an abnormal ovary of a White Leghorn hen which had a habit of 

 lasdng double-yolked eggs were compound follicles, apparently budding follicles. 



