VOLCANOES

THEIR STRUCTURE AND

SIGNIFICANCE

BY

T. G. BONNEY, D.Sc., LL.D., F.R.S.

PROFESSOR OF GEOLOGY AT UNIVERSITY COLLEGE, LONDON

ILLUSTRATED

NEW YORK

G. P. PUTNAM'S SONS

LONDON

JOHN MURRAY

551.21
8717

substituted ffor

213560

COPYRIGHT, 1899

BY

G. P. PUTNAM'S SONS

The Knickerbocker Press, New York