668 EXPERIMENT STATION RECORD. 



lots. At the close of the 112-day feeding period, lot 3 lacljed finish and so was 

 put on a grain ration for 28 days. While the gains were much better than 

 they had been previously, financial returns did not justify the added expense. 



Two lots of 20 breeding ewes each were fed 56 days, lot 1 receiving 4.5 lbs. 

 of alfalfa and lot 2, 3 lbs. of alfalfa and 1.5 lbs, of oat and pea silage per head 

 per day. They made total gains per sheep of 8 lbs. and 3 lbs., costing 18.9 cts. 

 and 14.7 cts. per week per ewe, resijectively. Both rations proved to be satis- 

 factory for maintenance requirements. There was apparently no difference 

 in the strength and quality of the lambs dropped by the two lots, the percent- 

 age of lambs being unusually high for the whole flock. 



Two lots of 12 and 11 rams each were fed 98 days, lot 1, receiving mill feed, 

 oats, and corn meal, 5:2:3, alfalfa, and oat and pea silage, and lot 2, grain 

 as in lot 1 and alfalfa. They made average daily gains per head of 0.24 and 

 0.32 lb., requiring 2.48 lbs. of grain, 12.21 lbs. of alfalfa, and 4.08 lbs. of silage, 

 and 1.93 lbs. of grain and 14.05 lbs. of alfalfa iter pound of gain, and costing 11.24 

 and 10.84 cts. per pound of gain for the respective lots. 



It is estimated from the results of the foregoing exi)eriments that oat and 

 pea silage has a value of !?4 per ton when first-class alfalfa is worth .^12. With 

 a larger percentage of peas in the silage its value ought to be correspondingly 

 increased. 



Analyses of the feeds used are appended. 



Branding paints, A. D. Faville {Wyoming Sta. Rpt. 1915, pp. 119-123, figs. 

 5). — Comparative tests were made of several varieties of branding paints. It 

 was found that brands applied to sheep before, immediately after, or several 

 days after dipping, were equally effective. Sheep of the fine wooled type carried 

 the brands best, as brands on long, loose, open fleeces quickly become indis- 

 tinguishable. Of the three sheep marking paints tested, two scoured out quite 

 readily while the third did not scour satisfactorily. 



Annual wool review for 1915, with estimate of domestic wool production 

 and other statistical records, W. J. Battisox {Bui. yat. Assoc. Wool Maufrs., 

 46 {1916), No. 1, pp. 1-66, pi. 1). — (Complete statistical data are given on domes- 

 tic and foreign wool product l<in, consumiition, and prices. 



The mineral nutrients in the feeding of swine, E. B. Forbes (J/o. Bui. Ohio 

 Sta., 1 (IV 16), So. 2, pp. 61-65. fig. 1). — A popular discussion, based largely on 

 work previously noted (E. S. 11., 33, p. 375). 



Live stock of the farm. — III, Horses, edited by C. B. Jones {London: The 

 Gresham Publishiny Co., 1915, vol. 3, pp. yiII+259, pis. 29, figs. /.?).— This 

 book treats of the breeds of heavy and light horses, their breeding, feeding, care, 

 and management, together with a chapter on the common diseases of the horse. 



Studies on the physiology of reproduction in the domestic fowl. — XIV, 

 The effect of feeding pituitai'y substance and corpus luteum substance on 

 egg production and growth, II. Pearl {Jour. Biol. Chem., 2^ (1916), Xo. 2, pp. 

 123-135, fifjs. 2). — In continuation of work previously noted (E. S. R., 33, p. 

 472), the author finds that "feeding the desiccated substance of the anterior 

 lobe of the pituitary body of cattle to hens in laying condition but at a time of 

 year when the rate of fecundity is declining, does not stimulate the ovary to an 

 increased rate of production. Feeding the same substance (pituitary body, ante- 

 rior lobe) to growing pullets does not bring about any earlier activation of the 

 ovary than occurs in normal control pullets not fed this substance. 



" The anterior lobe of the pituitary body from cattle when fed to growing 

 chicks is accompanied by a distinct retardation in growth in body weight. This 

 confirms for the chick the results which have been obtained with this substance 

 by other investigators in manunals. The feeding of the desiccated substance of 

 corpus luteum brings about a retardation of growth about twice as great iu 



