In this bulletin will be found a discussion of the seasonal distribution of egg production during first, second, and third, and later years of egg-laying of the same flocks of hens and a comparison of the distribution of production of high-laying and low-laying flocks in the same season, and different seasons as well as high-laying and low-laying individuals of the same flocks. These studies are based on six flocks of White Leghorn hens ranging from nine years to three years old and all descendants of a common flock. The methods of handling, feeding, and other details are discussed in previous publications and will not be repeated here.
Ball, E. D. and Alder, Byron, "Bulletin No. 149 - Breeding for Egg Production, Part II: Seasonal Distribution of Egg Production with Especial Reference to "Winter" Egg Production" (1917). UAES Bulletins. Paper 115.