SOME BOOKS OF THE WEEK.
[Under this heading we notice such Books of the week as have not been reserved for review in other forma All the World's Air-Craft. Edited by Fred T. Jane. (Sampson Low. 21s. net.)—Mr. Jane has just issued the third annual edition of his companion volume to his famous "Fighting Ships." Nothing could bring home to the reader more forcibly the rate at which evolution in aeronautics is proceeding than this absorbing work. Many of the machines described in its pages are already obsolescent, while others (such as the Short hydro- plane, which has recently given such good proof of its practice, bility) are too recent to be included in its catalogue. The machines are grouped under the various nationalities, and, if wo may make a suggestion, the value of the book would be increased by com- parative tables to show the relative strength of the several nations at a single glance. It is interesting to notice that although at the moment Great Britain is behind Germany in the number of naval and military aeroplanes, she is ahead of her as regards privately owned machines, the estimated figures being: Great Britain 180, Germany 100. France, of course, leads easily in this as in other categories with 400 private aeroplanes.
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