ANIMAL PEODUCTION. 71 



the actual results obtained in a niatinjjj of brown X brown which resulted in 

 a large percentage of bays. The author believes that the discrepancy here lies 

 in the interpretation of colors. 



Horse breaking- in Argentina iPafttoml Rev., 23 {1913), No. 9, pp. 886-S88, 

 figs. 3). — An account of horse-breaking methods in use in Argentina, and a 

 comparison w-ith those of Australia. 



Studies on inheritance in poultry. — I, The constitution of the White 

 Leghorn breed, P. B. IIadley, Dohotiiy W. Caldwkll, and C. II. Magoon 

 (Rhode Island Sta. Bui. 155, pp. 151-216, pis. 3). — By means of suitable matings 

 of wliite and dark birds a completely barred pattern w^as secured in Fa, and a 

 pure strain of barred fowls has been built up from these barred F2 individuals. 

 This barring characteristic is thought to have its origin in a factor for barring, 

 present in the gametes of the White Leghorn male, and not as was formerly 

 believed in a heterozygous condition of black and white. Evidence indicates 

 that the White Leghorn male is homozygous for this character, while the female 

 is heterozygous ; also that the White Leghorn male carries a factor for black 

 pigmentation. However, the presence of an inhibiting factor, which represses 

 the manifestation of black and is homozygous for the White Leghorn male, 

 naturally brings out the barred pattern. The presence of these inhibiting 

 factors is apparently peculiar to the Leghorn breed of fowls as a whole, but may 

 be used to advantage in controlling the manifestation of a variety of characters 

 in poultry. It is believed that this factor for barring, present in the White 

 Leghorn, accounts for various unexplained phenomena often observed in poultry 

 breeding. 



A former discussion has been previously referred to (E. S. R., 29, p. 372). 



[Inbreeding], J. H. Robinson {Farm Poultry, 24 {1913), No. 10, pp. 214, 

 215). — This is a discussion of the beneficial or detrimental effects of inbreeding 

 as applied to poultry raising, in which the author practically contends that it 

 is not interbreeding in itself that is harmful but interbreeding without rigid 

 selection or some change of condition. 



Report of the poultryman, H. Atwood {West Virginia Sta. Rpt. 1912, pp. 

 57-50). — Uncompleted experiments indicate that chicks are less vigorous when 

 hatched from eggs laid by hens which have been laying heavily for a long 

 time. A decided lack of phosphorus in the rations resulted in a material de- 

 crease in the number of eggs laid. The composition of the eggs did not seem 

 to bo materially changed. It was demonstrated that the average size of eggs 

 laid by hens varies considerably according to the season, the eggs being heavier 

 during February and March than at any other time; also that the eggs from 

 mature fowls are heavier than eggs from pullets. 



Report of poultry conditions in Indiana, A. G. Philips {Indiana 8ta. Circ. 

 40. pp. 32, figs. 20). — A report of data collected relative to the poultry conditions 

 in Indinna, in which lists of questions were sent out to 2.000 farmers. These 

 questions related to the extent of business, kind and amount of stock, selection 

 or breeding, housing and yarding, feeding, hatching and rearing, diseases and 

 parasites, management, and marketing of poultry. 



The refrigeration of dressed poultry in transit, Mary E. Pennington et al. 

 {U. S. Dept. Agr. Bui. 17, pp. 35, pi. 1, figs. 19).— The purpose of this investiga- 

 tion was to determine the temi)eratures prevailing in refrigerator cars hauling 

 dressed poultry throughout the entire transportation period, and to observe 

 the effect of such temperatures on the condition of the poultry when it arrives 

 at the market. The experiments reported, covering a period between August. 

 1909. and October, 1912, include 120 car-lot shipments of dressed poultry and 

 aggregate 140,000 miles of haul. Six different car lines are repr3sented. The 



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