18 JUNE 1927, Page 30

• Seven science publications deserve to be singled out. Messrs.

Macmillan's .X-Rays and Electrons, by Mr. A. H. Compton (25s.), Theory of Vibrating Systems and Sound, by Mr. I. B. Crandall (15s.), Physics for Colleges, by Mr. N. Ni. Sheldon and others (16s.), Lectures on Theoretical Physics, by Mr. H. A. Lorentz (I2s. 6d.), should be examined by College tutors ; and senior science masters would be well idviscd to see how far they can utilize these books. In Outlines of Experimental Chemistry, by Messrs. Ludlam and Preston (Arnold, 2 vols., 2s. and 2s. 6d.), we recognize an old Clifton textbook in a new guise. It proceeds along heuristic lines. However, it would be a pity to regard it as a rival to the well-established An Elementary Chemistry, by Mr. E. J. Holmyard, of which, on account of the historical perspective it conveys, the same firm is so justly proud. New books in botany always call for sympathetic consideration, and it is a pleasure to adjudge Elementary Botany, by Mr. W. Watson, Biology Master at Taunton School (Arnold, 6s. 6d.), sound and suitable for class work to matriculation standard. Girls' schools would do well to note this book. The subject is chiefly

theirs. * *