ELEMENTARY BIOLOGY

PLANT, ANIMAL, HUMAN

•The Co

THE MACMILLAN COMPANY
NEW YORK. BOSTON CHICAGO
DALLAS SAN FRANCISCO

MACMILLAN & CO., LIMITED

LONDON BOMBAY CALCUTTA
MELBOURNE

THE MACMILLAN CO. OF CANADA, LTD.

TORONTO

ELEMENTARY BIOLOGY

PLANT, ANIMAL, HUMAN

BY

JAMES EDWARD PEABODY, A.M.

HEAD OF THE DEPARTMENT OF BIOLOGY, MORRIS HIGH SCHOOL
BRONX, NEW YORK CITY, AUTHOR OF "STUDIES IN PHYSI-

ARTHUR ELLSWORTH HUNT, PH.В.

HEAD OF THE DEPARTMENT OF BIOLOGY, MANUAL TRAINING
HIGH SCHOOL, BROOKLYN, NEW YORK CITY

"The wild life of to-day is not wholly ours to dispose
of as we please. It has been given to us in trust. We
must account for it to those who come after us and
audit our records." HORNADAY.

-

New York

THE MACMILLAN COMPANY

1921

All rights reserved

P3S

COPYRIGHT, 1912,

BY THE MACMILLAN COMPANY.

Set up and electrotyped. Published February 1913

Norwood Press
J. S. Cushing Co. - Berwick & Smith Co.
Norwood, Mass., U.S.A.

TO

THE MEMORY OF

MARTHA FREEMAN GODDARD

WHOSE DEVOTED INSTRUCTION IN BIOLOGY IS A LASTING

INFLUENCE FOR GOOD IN THE LIVES OF HUNDREDS

OF BOYS AND GIRLS AND WHOSE RARE SKILL

IN LEADERSHIP IS AN INSPIRATION TO

EVERY TEACHER WHO KNEW HER

THIS BOOK IS DEDICATED

BY THE AUTHORS