17 JUNE 1922, Page 22

The Outline of Science. Edited by Professor J. Arthur Thomson.

Vol. L .(Newnes. -32s. net.)—This "plain story simply told" is a most commendable attempt to state the principles of natural science and the main results so far attained. It is well planned and carefully written, as we should expect any book edited by Professor Thomson to be, and it is remark- ably well illustrated with drawings, photographs, diagrams and coloured plates. This first volume, -which has appeared in fortnightly parts, is largely devoted to Evolution ; an admir- able chapter on "How Darwinism Stands To-day" contains a very lucid account of the modifications to which Darwin's -theory has been subjected, especially in view of the work done on the lines laid down by Mendel. There are good chapters on astronomy and natural history, on " The Dawn of Mind in Animals" and the new psychology, and on modern physio- logical discoveries, including -the functions of the glands and the mysterious " hormones " which they secrete. The popular- ization of the achievements of scientific research could hardly be better done.