2 AUGUST 1902, Page 26

Aiirial Navigation. By Frederick Walker, C.E. (Crosby Lock- wood and

Son. 7s. 6d. net.)—Mr. Walker is a believer in the airship of the future. There was a time, he argues, when the "ocean greyhound," which is now a commonplace fact, was regarded as an impossibility. Disasters must not discourage us; they have marked the road of every enterprise. We do not mean to contro- vert his diets, only we may remark that many things are lighter than water, and therefore are prima facie capable of floating on it, while nothing is lighter than air. But that this is a very Interesting book, with its examination of natural analogies, in- ventions, experiments, &c., there can be no doubt whatever.

In the "Home and School Library" (John Murray) we have Electric Wiring, by W. C. Clinton, B.Sc. (1s. 6d.)