Selective Action of Polarised Light upon Starch Grains

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THE letter of Prof. E. C. C. Baly and Dr. E. S. Semmens in NATURE of December 5, p. 817, on the selective chemical action of polarised light upon starch grains seems to me to raise a question of fundamental importance for optics. Is it possible to reconcile such an action with received views about the kinematic relations of polarised light?

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