METHUEN’S GEOLOGICAL SERIES

General Editor : J. W. GreGoRy, D.Sc, F.R.S,,
Professor of Geology in the University of Glasgow

THE PRINCIPLES OF PETROLOGY: an. Introduction
 to the Science of Rocks, By G. W. TYRRELL,
A.R.C.Sc, F.G.S., F.RS.E,, PhD. With 78 Diagrams.
 Crown 8vo. 10s, net.

THE ELEMENTS OF ECONOMIC GEOLOGY. By
Professor J. W. Grecory, With 63 Diagrams,
Crown 8vo.

GENERAL STRATIGRAPHY, By Professor J. W.
GREGORY and B, H. BarrerT, M.A. B.Sc. “With
Diagrams. Crown 8vo. In preparation.
GEOMORPHOLOGY. By F. Drrevuawm, O.B.E,,
M.A., Gonville and Caius College, Cambridge. With
Diagrams. Crown 8vo, In preparation.