1919] DAIRY FARMING DAIRYING. • 871 



Fertility experiments, B. F. Kaupp (Jour. Amer. Assoc. Instr. and Invest. 

 Potiltn/ Hush., 5 {1919). No. 7, pp. 5.?, 5//). — The cocks were removed from 

 flocks of hens (13 different varieties) at tlie North Carolina Experiment Sta- 

 tion. Egg fertility remained approximately normal for three days and then 

 dropped steadily. No fertile eggs were secured after the eleventh day. When 

 the cocks were returned, normal fertility was attained after five days. The 

 detailed records of tlie White Leghorn ilock are tabulated. 



The results of single, one-day mating's, .T. H. Martin and W. S. Anderson 

 {Jour. Amer. Assoc. Instr. and Invest. Poultry Hush., 5 (1918), No. 3, pp. 22, 

 23). — A vigorous Single Comb White Leghorn cock was allowed to tread 34 

 hens in less than 9 hours. The hens had all been isolated from males for some 

 time. Ten of the matings led to fertile eggs. The shortest interval between 

 mating and the appearance of fertilized eggs was 29 hours 23 minutes. The 

 longest interval was 6 days. 



Note on the behavior of capons when brooding' chicks, H. D. Goodale 

 (.lour. Anim. Bchanior, 6 (1916), No. Jf, pp. 319-324).— The brooding habits of 

 2 Rhode Island Red and 3 Brown Leghorn capons at the Massachusetts Experi- 

 ment Station are described. 



Both kinds cared for young chicks satisfactorily, led them about, scratched 

 up feed for them, and called them by clucking. The marked differences be- 

 tween the two breeds with respect to the broodiness of hens was not reflected 

 in the behavior of these capons, in fact the Leghorn capons were perhaps better 

 caretakers than the Rhode Island Reds. 



" Obviously, until more studies have been made of the behavior of fowls, the 

 brooding instinct of the capon can not be cited as proof of the assumption of a 

 female secondary sexual character by a castrated male." 



Concerning artificial lighting, G. R. Shoup (Washington Sta., West Wash. 

 Sta., Mo. Bui., 7 (1919), No. 7, pp. 10(>-110).—Aa\ice is given as to the handling 

 of a poultry flock when artificial illumination is used in winter to increase egg 

 production. 



Cottonseed hulls, a sanitary and vermin-proof litter for poultry, M. B. 

 T.\BENHAUs (Jour. Amer. Assoc. Instr. and Invest. Poultry Hush., 5 (1918), No. 

 3, pp. 23, 2Jf). — The following advantages are claimed for cottonseed hulls as a 

 litter in poultry houses: (1) Little dust is produced, (2) moisture does not 

 penetrate it easily, and (3) droppings become covered with small particles of 

 hulls and thus do not decompose readily and are not flattened out on the floor. 

 The author's observations were made in Texas. 



DAIRY FARMING— DAIRYING. 



Calf feeding experiments: Corn silage; whole milk dilutions, G. C. White 

 and J. A. Kuelling (Connecticut Storrs Sta. Bui. 102 (1919), pp. 91-136).— 

 To study (1) the desirability of introducing corn silage into the ration of dairy 

 calves early in life, (2) the results of substituting whole milk diluted with 

 water for skim milk, and (3) the feeding of a commercial calf meal in con- 

 junction with silage, 32 calves (dairy breeds, males and females) divided into 

 10 groups were put on experiment v.-ith the intention of feeding them for 180 

 days. The calves were mostly a week or so old when the experiments began. 

 Those that were to get the silage were allowed it as soon as they would eat 

 it. All calves received undiluted whole milk for the first 2 to 4 vv'eeks accord- 

 ing to circumstances. The normal amount of skim or diluted milk given daily 

 was 14 lbs. per head. The following tabulation gives the details of the feeding 

 158071°— No. 9—20 6 



