R. Peterm.

April 2, 1883.

Q

171 •H986aim

1877

AMERICAN ADDRESSES.

WITH A

LECTURE ON THE STUDY OF BIOLOGY.

BY

THOMAS H. HUXLEY.

"Naturæ leges et regulæ, şecundum quas omnia fiunt et ex unis
formis in alias mutantur, sunt ubique et semper eadem."

B. DE SPINOZA, Ethices, Pars tertia, Præfatio.

NEW YORK:

D. APPLETON AND COMPANY,
549 AND 551 BROADWAY.

1877.