- May 19, 2009
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The business hen (the latest hatch) - Page 106
Herbert Winslow Collingwood - 1910 - 191 pages
http://tinyurl.com/84b7nkr
"CONTROLLING SEX.—No one, so far as the writer knows, has yet solved the mystery of controlling the sex in breeding poultry. Many theories have been advanced, the chief of which is the one that the shape of the egg may be used as an indication of the sex. For instance, long eggs will be more likely to produce cockerels, and round ones pullets. The claim that mating young males and old hens will result in producing more pullets and that old males mated to pullets will produce more cockerels has been tried repeatedly without establishing the claim. It has been claimed that the season of hatching influences or determines the sex, the general belief being that the early hatches appear to contain a larger proportion of pullets than do the late hatches. All these and other theories of sex control have abundant verification in specific instances where they have proved true, but in as many other instances the reverse has been true."