. A study of selections for the variation and inheritance of the size, shape and color of hens' eggs. s allowedfreedom in the pen. During the 1913 breeding season and after, individualmating coops were installed, and individual mating was followed for theremainder of the experiment. New houses were used for the stock after1913 (fig. 11). All feeding, trap-nesting, and other details of management » Repertoire de couleurs. Published by La Socifitfi Fransaise des Chryaanth^miBtes and Ren6 Oberthur,with the collaboration of Henri Dauthenay and others. 1905. Study of Selections for Size, SnAPte, an
. A study of selections for the variation and inheritance of the size, shape and color of hens' eggs. s allowedfreedom in the pen. During the 1913 breeding season and after, individualmating coops were installed, and individual mating was followed for theremainder of the experiment. New houses were used for the stock after1913 (fig. 11). All feeding, trap-nesting, and other details of management » Repertoire de couleurs. Published by La Socifitfi Fransaise des Chryaanth^miBtes and Ren6 Oberthur,with the collaboration of Henri Dauthenay and others. 1905. Study of Selections for Size, SnAPte, and Color of Hens Eggs 207 were conducted under the supervision of the manager of the Cornellpoultry farm and in accordance with the usual practice on that general plan was to save all the chicks until maturity and thensave as many typical specimens from each group as could be satis-factorily housed. Usually about 120 females and 30 males were keptfor the study of the three characters, size, shape, and color. When thesurplus stock was culled each fall, an effort was made to save the birds. Fig. 11. TYPE OF HOUSE USED FOR STOCK AFTER I9I3 representing the extremes of the types. If there were birds that .hadproduced no chicks during the previous breeding season, these birds were?usually culled. In cases in which- nearly all the members of a certainfamily had developed only a medium quality for the character studied,the whole family was often culled to make room for more promising large proportion of cockerels and pullets were usually saved forthe first year, and these were culled fairly closely before being used asbreeders during the succeeding years. 208 Earl W. Benjamin These methods of selection explain why so few records are actuallyavailable for the study of some of the characters. In following the method of individual mating, each male to be matedwith any females in the pen is retained in a coop. Whenever a femaleis removed from the trap nest, the attendant
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectpoultry, bookyear1920
