Physics and Chemistry.

The Measurement of Steady and Fluctuating Temperatures. R. Royds, M.Sc., A.M.I.Mech.E. Demy 8vo. 162 pp.

This book gives a concise account of modern methods of measuring both steady and fluctuating temperatures and of their applications in industrial practice.

Heat Transmission. R. Royds, M.Sc., A.M.I.Mech.E. Demy 8vo.

Vol. I. By Radiation, Conduction, and Convection.

Vol. II. In Boilers, Condensers, and Evaporators.

Each volume sold separately.

Standards and Tests for Reagent Chemicals. Benjamin L. Murray. Member of the American Chemical Society, Chemical Society (London), Society of Chemical Industry, etc. etc. 385 pages. Demy 8vo.

The Silicates in Chemistry and Commerce. Drs. W. and D. Asch. Translated with Critical Notes and some Additions by A. B. Searle. 400 + xx pages. Royal 8vo. 21/- net.