ON LIGHT. The Burnett Lectures. By George Gabriel Stokes, M.A., P.R.S., &c., Fellow of Pembroke College, and Lucasian Professor of Mathematics in the University of Cambridge. Three Courses: I. On the Nature of Light; II. On Light as a Means of Investigation; III. On the Beneficial Effects of Light. Crown 8vo. 7s. 6d.

CHEMISTRY OF PHOTOGRAPHY. By Raphael Meldola, F.R.S., Professor of Chemistry in the Finsbury Technical College City and Guilds of London Institute for the Advancement of Technical Education. Crown 8vo. 6s.

MODERN VIEWS OF ELECTRICITY. By Oliver J. Lodge, D.Sc., LL.D., F.R.S., Professor of Experimental Physics in University College, Liverpool. With Illustrations. Crown 8vo. 6s. 6d.

TIMBER AND SOME OF ITS DISEASES. By H. Marshall Ward, F.R.S., Fellow of Christ's College, Cambridge, Professor of Botany at the Royal Indian Engineering College, Cooper's Hill. With Illustrations. Crown 8vo. 6s.

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NATURE:

A Weekly Illustrated Journal of Science.