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The History of Astronomy.

By Professor George Forbes, M.A., F.R.S, M. Inst.C.E.; author of "The Transit of Venus," etc. 164 pp., with Illustrations; cloth, 1s. net, by post IS. 3d.

The History of Chemistry. Vol I.: 2000 B.C. to 1850 A.D. By Sir Edward; Thorpe, C.B., LL.D., D.Sc., F.R.S.; Professor-Elect and Director of the Chemical Laboratories of the Imperial College of Science and Technology, South Kensington; author of "A Dictionary of Applied Chemistry," "Essays in Historical Chemistry," "Humphrey Davy: Poet and Philosopher," etc. 156 pp., with Illustrations; cloth, 1s. net, by post is. 3d.