FOR

UNSCIENTIFIC PEOPLE:

A SERIES OF DETACHED ESSAYS, LECTURES,
AND REVIEWS.

BY

JOHN TYNDALL, LL. D., F. R. S.,

AUTHOR OF "HEAT AS A MODE OF MOTION," "LECTURES ON SOUND," ETC., ETC.

NEW YORK:

D. APPLETON AND COMPANY,

549 & 551 BROADWAY.

1871.