The average annual egg production of different breeds of fowls, the production that may be expected under different environmental conditions, the average length of life, the total probable production of an individual and the distribution of this production through the life cycle, are all subjects of vital importance to every poultryman. They are also subjects upon which there must be reliable information before accurate breeding work can be carried on. A search through the literature shows that information on all these subjects is extremely meagre.
Ball, E. D.; Alder, Byron; and Egbert, A. D., "Bulletin No. 148 - Breeding for Egg Production: Part 1, A Study of Annual and Total Production" (1916). UAES Bulletins. Paper 114.