THIS revised edition supplies, in a convenient form, the kind of meteorological knowledge which is required by the airman. The author has since 1917 been in charge of the Aeronautical Division of the United States Weather Bureau, and is an acknowledged expert in upper air research. There are sections contributed by other experts on fog, ‘coiling’, and visibility, ice formation on aircraft, weather forecasting, instruments and methods of observations, airship meterology, and the Weather Bureau Airway Service.
W. R. Gregg C. G. Andrus R. N. Covert H. M. Hightman V. E. Jakl D. M. Little F. W. Reichelderfer J. A. Riley R. H. Weight-man. Second edition, revised and enlarged. Pp. xvi + 405. (New York: The Ronald Press Co., 1930.) 4.50 dollars.