770 EXPERIMENT STATION RECORD. [Vol. 36 



Summarizing incubation records during the season it was found that of 250 

 eggs set from lot 1, 90 per cent were fertile, 55 per cent of which hatched. 

 The corresponding figures for the other lots were as follows: Lot 2, 230, 90, 

 and 54.1 ; lot 3, 206, 92.2, and 46.3 ; lot 4, 262, 88.5, and 56 ; lot 5, 197, 91.3 

 and 48.3; and lot 6, 243, 98.5, and 43.9. From November 18, 1915, to May 17, 

 1916, the hens in lot 1 laid 636 eggs at a profit of $3.40 ; lot 2, 552, at a profit of 

 $2.67 ; lot 3, 404, at a profit of $1.63 ; lot 4, 730, at a profit of $6.25 ; and lot 5, 

 431, at a profit of $3.63. The egg production record of lot 6 is not given. 



The author states that the mortality was much higher in the chiclis from 

 the lots fed cottonseed meal, both in the normal and excessive amounts, than in 

 those from the lots fed beef scrap. 



Analyses of each of the feeds used are given. 



Cost of raising Leghorn pullets, A. G. Philips {Indiana 8ta. Bui. 196 

 (1916), pp. 20, figs. 6; popular eel., pp. 8, figs. -If)- — The experiments reported in 

 this bulletin covered four seasons' worlj and involved several thousand White 

 Leghorn chicks. The chicljs were reared in 8 by 8 ft. A-shaped colony brooder 

 houses, heated by gasoline, in yards covered with blue grass and clover. After 

 the heat was removed, each brooder house with its chicks was moved to a lot 

 130 by 150 ft. plaated to young fruit trees, the rows of which were intertilled 

 with corn. 



The grain ration consisted of sifted cracked corn, sifted cracked wheat, and 

 steel cut oats, equal parts by weight, until the chicks reached a weight of 

 0.7 lb. each, when the grain was changed to cracked corn and whole wheat. 

 The dry mash consisted of a mixture of bran, shorts, corn meal, and meat 

 scrap (2:2:2:1) to which was added a small quantity of charcoal and ground 

 dry bone. Green feed, grit, and skim milk were fed in abundance. When 

 the cockerels weighed about 1.25 lbs. they were removed to a fattening pen 

 and finished for market. 



Detailed data of one of the five experiments are tabulated and compared 

 with the average results of all the experiments. 



It was found that the cost of a pullet up to the time of laying varies largely 

 with feed prices. The average gross cost of raising pullets in these tests was 

 43.4 cts. When the profit from the cockerels was credited, the net cost of the 

 pullets varied from 24.3 to 50.5 cts., the average being 38.1 cts. It took 1.8 

 eggs to produce a Leghorn chick, the cost of which when hatched was 5.7 cts. 

 To 12 weeks of age the chicks in these tests consumed 5.96 lbs. of feed and 5.07 

 lbs. of milk per head, or 3.59 lbs. of feed and 3.41 lbs. of milk at a cost of 8.4 

 cts. per pound of gain. The average weight per pullet in the five experiments 

 at 168 days of age was 2.75 lbs. The percentage of mortality varied from 

 8 to 29.5 in the different experiments, the average being 17. In these experi- 

 ments 100 pullets were raised from every 457 eggs set. 



Plans are given of the Purdue shed-roofed colony brooder house. 



Temperature experiments in incubation, A. G. Philips {Indiana Sta. Bui. 

 195 {1916), pp. 31, figs. 5; popular ed., pp. S, figs. 5). — These experiments were 

 planned for the purpose of determining the influence of different temperatures 

 in the incubator on brown and white eggs, the upper and lower temperature 

 limits of artificial incubation, and the influence on temperature readings of 

 placing thermometers at different heights in the machine. 



Four 150-egg incubators were used. They were of the hot-air type, supplying 

 heat by both radiation and diffusion, and moisture by a sand tray underneath 

 the egg trays. The five thermometers used were standard incubator thermome- 

 ters, generally known as hanging, standing, touching, and Inovo. The hanging 

 thermometer was suspended from the top of the incubator, 2 in. above the center 

 of the egg tray. The standing thermometer was on a metal stand in the center, 



