$6.41 profit per hen per year. The Corning egg book, illustrating the poultry methods originated by the late Prof. G. M. Gowell...and perfected by Edward and Gardner Corning Boyer, Michael K., 1858-1935 creator text book [Philadelphia] Wilmer Atkinson co 1909 1909
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ENG Economic aspects Eggs Poultry Production SF487 .B82 https://www.biodiversitylibrary.org/bibliography/36735 18478656 10000627 10.5962/bhl.title.36735 DLC