The Nature of Animal Light

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Uncommon forms for chemical names have been retained where they occur in the text, e.g. atropin for atropine ; asparagin for asparagine , etc. The spellings of Sidot blend and Sidot blende are used interchangeably in the text.
Some inconsistencies in formatting and punctuation have been retained from the original. PH or P H (P subscript H) is retained as used in the text for the scale of alkali-acidity where the more familiar modern usage is pH . Molar concentrations are indicated in various ways (lower case m, italic lower case m , small capital m): the formats are retained as in the original.
EDITED BY
JACQUES LOEB, Rockefeller Institute T. H. MORGAN, Columbia University W. J. V. OSTERHOUT, Harvard University
E. NEWTON HARVEY, Ph.D.

MONOGRAPHS ON EXPERIMENTAL BIOLOGY
PUBLISHED
FORCED MOVEMENTS, TROPISMS, AND ANIMAL CONDUCT By JACQUES LOEB, Rockefeller Institute