1918] 



ANIMAL PRODUCTION, 



775 



The following table shows by 100-lb. intervals the average results of the 

 two experiments : 



Effect of age on rate and economy of gains in pigs. 



The breaking of unruly horses, especially those from America, Dakras 

 {Tie Agr. et Rurale, 7 {1911), No. 1^, pp. 239-242, figs. 3).— Many horses im- 

 ported into France for war purposes are not properly broken and some are so 

 vicious that they are of little or no use. A method is described for breaking 

 such horses quickly and using them in various branches of the service. For this 

 work a specially constructed box or stall is used which confines the animal and 

 yet allows handling by the trainer without the necessity of employing undue 

 force or brutality. The stall is figured and described in detail. 



The practical utilization of the light horse, P. Diffloth {Vie Agr. et 

 Rurale, 7 {1917), No. U, pp. 233-235, figs, -i).— The adaptability and value of 

 the small horse in modern warfare are discussed. 



How to select laying hens, O. B. Kent {N. Y. State Col. Agr., Cornell Univ. 

 Ext. Bill. 21 {1917), pp. 23-33. pis. 5, figs. 9).— The author points out indica- 

 tions of laying condition in hens as shown by changes in fat, color, body shape, 

 secondary sexual characters, plumage, and actions. Directions are given for 

 culling flocks of hens on this basis. 



Wing molt as an indication of production, O. B. Kent {Cornell Country- 

 man, 15 {191S), No. 4, pp. 192, 198, 212, figs. 3). —A method is described of de- 

 termining quite accurately by the primary wing feathers how long a fowl has 

 been in molt. It has been found that the time that a fowl stops laying in the 

 fall is closely related to her total egg production, and that a hen, especially 

 a Leghorn, usually stops laying when she begins molting. The time of onset of 

 molting thus furnishes a means for determining how many eggs a bird has laid. 



Value of breeding from selected stock, H. M. Lamon {Jour. Alass. Poultry 

 Soc, 1 {1917), Nos. 2, pp. 15, 16; 3, p. 24; 4, PP- 30-52).— This is a di.scussion 

 of the selection of poultry for vigor and vitality and the value of breeding from 

 selected stock. The author recommends that in breeding work (1) a detailed 

 description of matings be kept, (2) every hen trap nested and every chick toe 

 punched, banded, or marked in some way, (3) 2 or 3-year old hens used to 

 breed from, as these lay larger eggs than pullets, and (4) chicks hatched in 

 March and April. He maintains that healthy fowls and good incubation, brood- 

 ing, feeding, and range are necessary for the successful production of high-class 

 stock. 



A fowl's breeding value, W. A. Lippincott {Country Oent., 82 {1917), No. 

 52, pp. 10, 11, figs. 8). — In a flock of a breed of chickens, some of whose dis- 

 tinguishing characteristics are dominant, there is always a chance that some 

 such character as rose comb or silver or black color may be carried in an impure 

 or heterozygous condition. The author outlines the method of testing indivi- 



