THE

SUBTERRANEAN WORLD.

LONDON: PRINTED BY

SPOTTISWOODE AND CO., NEW-STREET SQUARE AND PARLIAMENT STREET

BODLEY

BIBL

THE

SUBTERRANEAN WORLD.

BY

DR. GEORGE HARTWIG,

AUTHOR OF

'THE SEA AND ITS LIVING WONDERS,' 'THE TROPICAL WORLD,' 'THE POLAR WORLD,'
AND THE HARMONIES OF NATURE.'

WITH THREE MAPS AND NUMEROUS ENGRAVINGS ON WOOD.

BODLE

OTH

LONDON:

LONGMANS, GREEN, AND CO.

188. e. 27.