3 MARCH 1928, Page 20

The third edition of Ultra-Violet Rays in the Treatment and

Cure of Disease, by Dr. Percy Hall, with introductions by Doctors Sir Henry Gauvain and Leonard Hill (Heinemann, 12s. 6d.), is a work for the practitioner, but it will, however, also interest the layman who wants to know something about one of the newest and most hopeful departments of modern medical science.