1019] 



DAIRY FARMING — DAIRYING. 



773 



fed shelled corn and wheat (8:1) twice daily to the extent of double the mash 

 consumption. The records may be summarized as follows: 



Egg record of three lots of White Leghorns hatched at different periods in the 



spring. 



A table is published expressing the egg production of each lot by 4-week 

 periods during the first year as percentages of the maximum, an egg a day 

 per bird. Daring August, September, and October, this percentage in the case 

 of the early hatched lot varied from "Jo" to -IT, but from November 1 to Jan- 

 uary 24 it was throughout between G and 7. During the latter period the pul- 

 lets went through a molt resembling thai of year-old liens. The production 

 of the April-hatched let varied from IS to 40 per cent during November, De- 

 cember, and January, and showed no pronounced slump until the following No- 

 vember. In all three lots the highest production of any period occurred at the 

 same time, between March 22 and April 18. 



The author concludes that there is practically nothing to be gained by hatch- 

 ing Leghorn eggs as early as February 22 in the latitude of Wooster, Ohio, 

 considering the high price which the same eggs would bring on the market, 

 the low fertility, the long period the chicks must be kept in the brooder, and 

 the drop in production of the resulting pullets during the winter months. 



[Feeding values of skim milk and meat scraps for egg production], A. G. 

 Philips (Indiana Sta. Rpt. 1918, pp. 5-i-oG). — A progress report shows that 

 pens of White Plymouth Hocks and Siir.rlo Comb White Leghorns receiving 

 animal feed in addition to a basal ration of corn, wheat, oats, bran, and shorts 

 produced in the pullet year over twice as many eggs as pens receiving the basal 

 rations alone. One of the experiments was continued a second year. A pen 

 of White Leghorns receiving skim milk throughout laid L33.9 eggs per bird 

 the first year and 119.6 eggs the second. The check lot receiving no animal 

 feed the pullet year laid G1.4 eggs per bird, hut in the second year, when given 

 skim milk, it produced an average of 150 eggs. 



DAIRY FARMING— DAIRYING. 



A study of the relative reliability of official tests of dairy cows. W. W. 

 Yapp (Illinois Sta. Bui. 215 (1'JIU), pp. 323-339, figs. 7).— The purpose of this 

 bulletin is mainly to compare the 7-day or " official " advanced registry test of 

 Holsteiu cows with the year or "semiofficial" test. In confirmation of the 

 common impression that the latter gives a reliable measure of a year's actual 

 production, the author cites data from the University of Illinois herd showing 

 that the average yearly butter fat production of 30 cows as determined by the 

 semiofficial method — monthly butter fat percentage estimated from 2 days' 

 milk — was 408.8±8.1 lbs., whereas the amount as determined by weekly com- 

 posite samples was 415.5±S.l. The difference, considering the probable errors, 

 is not regarded as significant 



