15 SEPTEMBER 1917, Page 16

The Flying Book, 1917. Edited by W. L. Wade. (Longnaares

and Co. 3s. Gd. not.)—This book, though somewhat tantalizing in its enforced omission of the many new machines and devices that have been invented for the war, contains, nevertheless, much interesting information about the ohiof types of aircraft and their engines, with lists of manufacturers, peace records that are now obsolete, and some photographs.