1919] 



ANIMAL PRODUCTION. 



S7f, 



Comparative value of protein tupplemanU in fattening lambs. 



The feeding of supplements, although Increasing the grain required per 



pound of gain, enhanced the selling value of the Lambs from 5 to 20 cts. pel 

 100 lbs. and made a more favorable margin per lamb. Taking into account all 

 the factors, it is computed that $118.60 per ton could have boon paid for the 

 linseed meal, $67.20 for the velvet beau feed meal, and $143 tor the peanut 

 meal without reducing the margin per lamb below that of the control lot. The 

 actual purchase prices were $60, $45, and $55 per ton, respectively. 



The fifth lot received corn gluten feed exclusively instead of shelled corn 

 during the first 60 days, and a mixture of corn gluten feed, shelled corn, and 

 linseed meal (6:1:1) during the final 3 weeks. The average daily gain per 

 head was 0.26 lb. It is estimated that the corn gluten feed was 1)7.7 per cent 

 as efficient as shelled corn when fed with silage and alfalfa. There was a 

 small saving of corn silage and hay, but the total grain required tor a pound 

 of gain was considerably increased. 



The dressing percentages varied from 52.9 for lot 5 to 54.2 for the lot 

 receiving peanut meal. The carcasses of the velvet meal lot graded first in 

 color, covering of fat, and firmness, with the peanut meal lot a close second. 

 The control and gluten feed lots-graded last in these respects. 



Block salt was given freely to each lot, the amounts consumed being recorded. 

 Proximate analyses of all feeding stuffs used are published, as well hs the 

 feed records by monthly periods and financial statements. 



The wool industry, P. T. Chekington (Chicago: A. 11'. Shatc Co., 1916, pp. 

 X \ 1+261). —While most of this volume deals with the marketing of wool. 

 the "life history" of clothing styles, and the problems of the manufacturer of 

 woolen goods, several chapters are devoted to the economic factors of pro 

 duction, the domestic wool supply, and the Influence of trade demands and 

 the tariff on wool growing. 



Wool, F. Ormekod (London: Constable & Co.. Ltd., 1918, pp. XlI+218, pis. 

 12; rev. in Nature [London], 102 (1919), No. 2561, pp. .162, S6S).— The Im- 

 portance of wool in English history, the development of breeds of sheep, 

 the world's wool supply, wool and sheep in Australia, marketing of wool, shear 

 ing, sorting, and the various processes used in the manufacture of cloth, are 

 discussed briefly in this volume, winch is the first of a series entitled Staple 

 Trades and Industries, edited by G. D. Knox. A considerable amount of 

 statistical Information on production and prices is provided. 



Feeding horses, G. A. Bell and J. O. Williams | r. fif. Dept. Igr., Far, 

 Iiul. 1030 (1919), pp. 24).— A consideration of the selection of feeds for to 



directions for computing rations, a discussion of the uses of common f ling 



stuffs, and some sample rations are presented. Armsby's table i K. S. K . 36, p. 

 469) showing the digestible crude protein and net energy of different feeding 

 stuffs, as determined by experiments with cattle and sheep, Is reprinted with 

 a few additions, mainly rice, sorghum, and potato products. It is held that 

 the data have sufficient general application to be used in horse feeding. 



