1917] ANIMAL PEODUCTION. 667 



Inspection of commercial feed stuffs, P. H. Smith et ai>. {Massachusetts 

 Sta. Control Ser. Bui. 5 (1916), pp. 4-69). — Brief comments are made upon the 

 results of feeding stuffs inspection in the State during the year ended September 

 1, 1916, and the results are given of the analyses of cottonseed meal, linseed 

 meal, corn oil cake, coconut meal, peanut meal, gluten meal, gluten feed, 

 distillers' dried grains, malt sprouts, brewers' dried grains, yeast and vinegar 

 grains, red dog flour, wheat middlings, wheat bran, corn meal, corn bran, 

 hominy meal, dried beet pulp, buckwheat bran, meat scrap, beef scrap, digester 

 tankage, bone meal, fish scrap, fish meal, clover meal, alfalfa meal, and mixed 

 and proprietary feeds. 



A brief article on the net weights of feeding stuffs is appended, together 

 with tabulated wholesale cost data of feeding stuffs for the year. 



Condimental stock foods and proprietary remedies, W. G. Gaessleb {lotva 

 Sta. Circ. 31 (1916), pp. 2-4)- — Advice is given against the indiscriminate pur- 

 chase and use of condimental stock foods and tonics. 



The breeding of animals, F. B. Mumford (Neto York: The Macmillan Co., 

 1917, pp. XVII +310, pis. 32, figs. 17).— In this manual for students and breed- 

 ers of animals the author discusses the principles of genetics as they apply 

 to the practice of animal breeding in accordance with the conclusions of biolo- 

 gists. Emphasis is placed upon those principles and practices that belong 

 peculiarly to the province of the animal breeder, while not neglecting the 

 lessons and illustrations to be drawn from the field of plant breeding. 



The maintenance of breeding ewes of mutton and wool sheep, B. O. Sex'eb- 

 soN (Pennsylvania Sta. Bui. 1J,J, (1916), pp. 3-20, figs. 6).— This bulletin is a 

 summary of experiments upon the maintenance of breeding Shropshire and 

 Delaine-Merino ewes begun at the station in 1911. The results secured during 

 1911-1913 have already been noted (E. S. R., 34, p. 171; 35, p. 565). 



During the winter periods 1913 tc 1916 the sheep used were a few of the 

 ewes remaining from the former tests and some of their offspring. The 

 Shropshire pens, lots 1 and 2, consisted of 8 ewes each in the winter of 1913-14 

 and 10 ewes each in the winters of 1914-15 and 1915-16. The Delaine-Merino 

 pens, lots 3 and 4, consisted of 6 ewes each in the winters of 1913-14 and 

 1914-15 and 8 ewes each in the winter of 1915-16. During the three winters 

 1913 to 1916 the different lots received the same grain mixture as the corre- 

 sponding lots during the earlier period except that no cottonseed meal was 

 fed. The roughage consisted of alfalfa hay for lots 1 and 3 and corn silage 

 and alfalfa hay for lots 2 and 4. For lots 2 and 4 the alfalfa hay was limited 

 to 2 lbs. per head daily for lot 2 and to 1.75 lbs. for lot 4 in 1915-16, and the 

 silage to 2 lbs. per ewe daily in 1913-14. In 1914-15 the grain mixture was 

 not fed previous to lambing and only to ewes that yeaned. During the summers 

 the ewes were alternated on two pastures every two weeks. They flocked 

 together without any grain except for a few weeks prior to and during the 

 breeding season. 



The average annual cost of maintenance of these ewes from December, 1913, 

 to May, 1916, including interest, depreciation, and mortality risk, with alfalfa 

 hay at $15 per ton, was $9 for lot 1, $7.59 for lot 2, $8.29 for lot 3, and $7 for 

 lot 4. The average percentages of lambs by the ewes that yeaned were 195, 

 163, 115, and 126, and the percentages of lambs raised by ewes that yeaned 

 were 110, 95, 95, and 100, respectively, for the four lots during the three years. 

 The average weight of the lambs at weaning time for the four lots was 58.78, 

 59, 57.6, and 53.1 pounds, respectively. The average weight of fleece per ewe 

 was 8.56 lbs. for lot 1, 7.66 for lot 2, 12.3 for lot 3, and 11.13 for lot 4. The 

 average loss in weight per ewe during the three winter periods was 23.72 

 lbs. for lot 1, 19.87 for lot 2, 9.38 for lot 3, and 6.63 for lot 4. During the 



