The Journal of General Physiology
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The Journal of General Physiology, Vol 15, 139-145, Copyright © 1931 by The Rockefeller University Press

ARTICLE

PHOTOCELL ANALYSIS OF THE LIGHT OF THE CUBAN ELATERID BEETLE, PYROPHORUS

E. Newton Harvey 1

1 From the Physiological Laboratory, Princeton University, Princeton

Records are reproduced showing various types of luminescence intensity—time curves for the prothoracic light organs of Pyrophorus. A small (5 per cent) rhythmic fluctuation of light intensity during the reflex emission of light is to be observed in many records, which because of its rapid rate is attributed to rhythmic nerve discharge from a photogenic centre. Longer "pulsations" of luminescence intensity (25 per cent change) can be detected by the eye.

Accepted on June 26, 1931


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