Abstract
WHEN announcing in 1932l that the reproduction of a mammal (Microtus) could be controlled by the duration of artificial illumination, R. M. Ranson and I published a statement that lights were used in poultry-houses in Spain more than a century ago for the purpose of increasing egg-production. Since then I have from time to time been asked for our authority for this statement. In view of the growing interest in the relation between light and reproduction, it may be worth while to give further particulars.
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References
Baker, J. R., and Ranson, R. M., Proc. Roy. Soc., B, 110, 313 (1932).
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BAKER, J. Increasing Winter Egg-Production in Spain more than a Hundred Years Ago. Nature 143, 477 (1939). https://doi.org/10.1038/143477b0
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DOI: https://doi.org/10.1038/143477b0
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