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EVOLUTION AND ADAPTATION
IEVOLUTION
AND ADAPTATION
BY
THOMAS HUNT MORGAN, Ph.D.
New York
THE MACMILLAN COMPANY
LONDON: MACMILLAN & CO., Ltd.
1908
All rights reserved
IICopyright, 1903,
By THE MACMILLAN COMPANY.
Set up and electrotyped. Published October, 1903. Reprinted January, 1908.
Norwood Press
J. S. Cushing Co.—Berwick & Smith Co.
Norwood, Mass., U.S.A.
IIITO
Professor William Keith Brooks
AS A TOKEN OF SINCERE ADMIRATION AND RESPECT
vii
PREFACE
The adaptation of animals and plants to the conditionsunder which they live has always excited the interest, andalso t
...