OPEN-AIR STUDIES IN GEOLOGY:

An Introduction to Geology Out-of-doors.

By PROFESSOR GRENVILLE COLE, M.R.I.A., F.G.S.

For details, see Griffin's Introductory Science Series, p. 85.

Crown 8vo. Handsome Cloth, 2s. 6d.

RESEARCHES ON THE PAST AND PRESENT HISTORY OF THE EARTH'S ATMOSPHERE.

Including the latest Discoveries and their Practical Applications.

By DR. THOMAS LAMB PHIPSON.