1917] ANIMAL PKODUCTION. 769 



In the tankage lots in experiment 5 tlie ratio fed was 9 : 1 during the first 

 six weeks and 12 : 1 during the last six weeks. " In the lots where skim milk 

 and buttermilk were used a like change in proportions was made." 



The authors state that " hogs scour severely when fed large quantities of 

 rice polish when it is dampened just before feeding. The addition of lime water 

 checked the scours. In lots where the rice polish was thoroughly soaked for 

 12 and 24 hours, no scouring occurred. 



" These experiments were all conducted on fairly well grown shotes for 

 fattening purposes, and no indications of incomplete nutrition were noticeable, 

 such as have been reported by some where rice polish was used alone for grow- 

 ing pigs. Rice polish is not as palatable as corn chop, especially during the 

 close of the fattening period. Hogs go off feed readily at that time. When fed 

 with skim milk and buttermilk great gains and an excellent finish are possible." 



Detailed data for each lot in the five experiments are tabulated by periods 

 in the appendix. 



Breeds of swine, F. G. Ashbbook (f7. S. Dept. Agr., Farmers' Bui. 165 

 (1917), pp. 16, figs. 14). — This gives information concerning the various breeds 

 of swine, their origin, general appearance, development, and adaptability. 



How to select a sound horse, H. H. Reese (U. S. Dept. Agr., Farmers' Bui. 

 "779 (1917), pp. 26, figs. 36). — This gives concise information on the selection of 

 sound horses by thorough, systematic examination, and points out by means 

 of illustrations how to observe blemishes, vices, faultj' conformation, unsound- 

 ness, general characteristics, and the indications of age in horses. 



A study of the effect of cottonseed meal v. beef scrap upon the egg pro- 

 duction, fertility, and vitality of poultry, B. A. Ahrens (Oklahoma Sta. Bui. 

 112 (1917), pp. 3-20).— T\\e first of these experiments with White Leghorns 

 was begun in November, 1914. In this test there were three lots of ten pullets 

 and two cockerels each. These birds were bred at the station from sires and 

 dams of strong constitutional vigor. Each of the lots received a grain ration 

 of Kafir corn and whole wheat, equal parts by weight. In addition, lot 1 

 received a mash of millrun, corn chop, beef scrap, and bone meal (7:6:2:1); 

 lot 2 a mash of millrun, corn meal, cottonseed meal, and bone meal (6:6:3:1); 

 and lot 8 a mash of millrun, corn chop, cottonseed meal, and bone meal 

 (3:3:9:1). The nutritive ratios of the rations were, for lots 1 and 2, 1:4.5, 

 and for lot 3, 1 : 3.5. The chicks hatched from the different lots were kept sepa- 

 rate from birth and fed on the same type of ration as their parents, due allow- 

 ance being made for changing the exact composition of the ration to meet the 

 requirements of the growing period. During this test the health of the birds 

 was excellent. One pullet from lot 3 died of roup and one male from the same 

 lot died from the effects of being crop bound. 



In a preliminary test of all eggs laid for three weeks before February 2, 

 1915, the following percentages of fertility were found after seven days incuba- 

 tion : Lot 1, 75.7 ; lot 2, 97.4 ; and lot 3, 100. The incubation records from Feb- 

 ruary 2 to July 10, 1915, showed that of 711 eggs set from lot 1, 89.5 per cent 

 were fertile, 82.8 per cent of which hatched ; of 535 eggs set from lot 2, 90.8 

 per cent were fertile, 48.7 per cent of which hatched ; and of 334 eggs set from 

 lot 3, 87.7 per cent were fertile, 31 per cent of which hatched. From November 

 18, 1914, to November 17, 1915, lot 1 produced 1,394 eggs at a profit of $5.05; 

 lot 2, 998 eggs at a profit of $1.35 ; and lot 8, 744 eggs at a profit of 46 cts. 



During the season of 1915-16 these birds were rearranged into six lots to 

 eliminate the effect of difference in stock, except that the birds in the original 

 lot 3 were carried along as lot 3 in this test. Lots 1 and 4 were fed the same 

 ration as lot 1 of the former season, lots 2 and 5 the same as lot 2 of the 

 former season, and lots 3 and 6 the same as lot 3 of the former season. 



