Abstract
THE production of turkey hatching eggs on a commercial scale has brought out the problems of increasing the egg production of the breeding females, and of producing earlier eggs to supply the demand for early poults. From the results of previous experimental work it would seem that the use of artificial lights might be the most promising method of obtaining these results. While work has been reported indicating that turkeys can be brought into production earlier by the use of artificial lights, the length of the lighting period prior to production has not been determined definitely and the effect of lights upon early fertility seemed debatable, although Albright and Thompson (1933 Albright and Thompson (1934) had obtained some evidence that the use of artificial lights injured neither the birds nor the hatchability. These workers also reported that egg production could be increased by the use of artificial lights, having obtained an average annual .
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