Further studies on the relation of the d
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Burger, J. Wendell
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Article
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1940
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John Wiley and Sons
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English
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Bissonnette ('30 et. seq.) first showed for the male starling that periods of artificial illumination, usually of about 6 hours when added daily to natural fall and winter day-lengths, will induce a precocious spermatogenesis. In an opposite direction, a reduction in the daily length of exposure to