Chapter I: Front Matter

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Transcriber's Notes

In this Plain Text version, Greek cursive characters used in formulae are represented as [alpha], [beta], [gamma], [lambda], [nu], [pi] & [upsilon]. Symbols for male and female are represented as [male] and [female]. In chemical formulae, the "left arrow over right arrow" symbol is represented by "<=>"

Italic typeface has been represented by the use of _underscores_. Small capital typeface has been represented by the use of ALL CAPITALS.

Superscript characters are indicated by caret and braces, e.g. 10^{-8} ("ten to the power of minus eight"). Subscript characters are indicated by underscore and braces, e.g. H_{2}O.

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).

Changes to the text have been made only in the case of obvious spelling or type-setting errors. These are listed at the end of the book.

* * * * *

MONOGRAPHS ON EXPERIMENTAL BIOLOGY

EDITED BY

JACQUES LOEB, Rockefeller Institute
T. H. MORGAN, Columbia University
W. J. V. OSTERHOUT, Harvard University

THE NATURE OF ANIMAL LIGHT

BY

E. NEWTON HARVEY, Ph.D.

* * * * *

_MONOGRAPHS ON EXPERIMENTAL BIOLOGY_

PUBLISHED

FORCED MOVEMENTS, TROPISMS, AND ANIMAL CONDUCT
By JACQUES LOEB, Rockefeller Institute

THE ELEMENTARY NERVOUS SYSTEM
By G. H. PARKER, Harvard University

THE PHYSICAL BASIS OF HEREDITY
By T. H. MORGAN, Columbia University

INBREEDING AND OUTBREEDING: THEIR GENETIC AND SOCIOLOGICAL
SIGNIFICANCE
By E. M. EAST and D. F. JONES, Bussey Institution, Harvard
University

THE NATURE OF ANIMAL LIGHT
By E. N. HARVEY, Princeton University

IN PREPARATION

PURE LINE INHERITANCE
By H. S. JENNINGS, Johns Hopkins University

THE EXPERIMENTAL MODIFICATION OF THE PROCESS OF INHERITANCE
By R. PEARL, Johns Hopkins University

LOCALIZATION OF MORPHOGENETIC SUBSTANCES IN THE EGG
By E. G. CONKLIN, Princeton University

TISSUE CULTURE
By R. G. HARRISON, Yale University

PERMEABILITY AND ELECTRICAL CONDUCTIVITY OF LIVING TISSUE
By W. J. V. OSTERHOUT, Harvard University

THE EQUILIBRIUM BETWEEN ACIDS AND BASES IN ORGANISM AND ENVIRONMENT
By L. J. HENDERSON, Harvard University

CHEMICAL BASIS OF GROWTH
By T. B. ROBERTSON, University of Toronto

COORDINATION IN LOCOMOTION
By A. R. MOORE, Rutgers College

OTHERS WILL FOLLOW

* * * * *

Monographs on Experimental Biology

THE NATURE OF ANIMAL LIGHT

BY

E. NEWTON HARVEY, Ph.D.

PROFESSOR OF PHYSIOLOGY, PRINCETON UNIVERSITY

PHILADELPHIA AND LONDON
J. B. LIPPINCOTT COMPANY

COPYRIGHT, 1920. BY J. B. LIPPINCOTT COMPANY

_Electrotyped and Printed by J. B. Lippincott Company.
The Washington Square Press, Philadelphia, U. S. A._

EDITORS' ANNOUNCEMENT

The rapid increase of specialization makes it impossible for one author to cover satisfactorily the whole field of modern Biology. This situation, which exists in all the sciences, has induced English authors to issue series of monographs in Biochemistry, Physiology, and Physics. A number of American biologists have decided to provide the same opportunity for the study of Experimental Biology.

Biology, which not long ago was purely descriptive and speculative, has begun to adopt the methods of the exact sciences, recognizing that for permanent progress not only experiments are required but quantitative experiments. It will be the purpose of this series of monographs to emphasize and further as much as possible this development of Biology.

Experimental Biology and General Physiology are one and the same science, in method as well as content, since both aim at explaining life from the physico-chemical constitution of living matter. The series of monographs on Experimental Biology will therefore include the field of traditional General Physiology.

JACQUES LOEB,
T. H. MORGAN,
W. J. V. OSTERHOUT.