Like the two preceding volumes which were published in 1944 and 1950, this one consists of a series of articles in alphabetical order according to subject, from 'Absorption" and "Accelerators" to "Vision" and "Weighing." Each article is a coherent, complete treatment of a subject rather than a brief definition. Words that do not in themselves merit a long article can be located in the subject index and can thus be found either explicitly defined or else used in context that provides helpful orientation. A classified table of contents enables the reader to locate all articles relating to a given major subject, such as anesthesia, biometry, chromatography, electronics, gynecology, heart, isotopes, mechanics, nuclear physics, space medicine, speech, surgery, and ultrasound.
The discussion is practically always concrete and precise, and the care with which the occasional mathematical material has been set up deserves the gratitude of all serious students. There is a