THE

NATURE OF MAN

STUDIES IN OPTIMISTIC

PHILOSOPHY

BY

ÉLIE METCHNIKOFF

PROFESSOR AT THE PASTEUR INSTITUTE

THE ENGLISH TRANSLATION

EDITED BY

P. CHALMERS MITCHELL

M.A., D.Sc. Oxon.

SECRETARY OF THE ZOOLOGICAL SOCIETY
OF LONDON

G. P. PUTNAM'S SONS
NEW YORK AND LONDON

The Knickerbocker Press

1905

B