13 FEBRUARY 1909, Page 25

Atria/ Warfare. By R. P. Hearne. (John Lane. 7s. 6d.

not.) —In this volume, which comes with a recommendatory introduc- tion from Sir Hiram Maxim, we have is summary of the past of aerial navigation and an account of its present condition. Tho author believes in the revolution which inventions made or in process of making will bring about in the warfare of the future, and we commend his book to the attention of our readers.