ELEMENTS OF CRYSTALLOGRAPHY, for Students of Chemistry, Physics, and Mineralogy. By G. H. Williams, Ph.D. Crown 8vo. 6s.

POPULAR LECTURES AND ADDRESSES. By Lord Kelvin, P.R.S., Vol. II. Geology and General Physics. Crown 8vo. 7s. 6d.

THE PLANET EARTH. By R. A. Gregory, F.R.A.S. Crown 8vo. 2s.

PHYSIOGRAPHY. An Introduction to the Study of Nature. By the Right Hon. T. H. Huxley, F.R.S. Illustrated. Crown 8vo. 6s.

SHORT STUDIES IN EARTH KNOWLEDGE. Introduction to Physiography. By William Gee. Illustrated. Globe 8vo. 8s. 6d.

OUTLINES OF PHYSIOGRAPHY—THE MOVEMENTS OF THE EARTH. By J. Norman Lockyer, F.R.S. Illustrated. Crown 8vo. Sewed, 1s. 6d.

PHYSIOGRAPHY FOR BEGINNERS. By A. T. Simmons, B.Sc. Globe 8vo. 2s. 6d.

MACMILLAN AND CO. Ltd., LONDON.