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Commander Gemmill's book presents a concise outline of the present status of aviation medicine from a physiologic point of view and is written in such a way that it is of value not only to flight surgeons but to aviators as well. The changes which a normal person must undergo in flying, such as acceleration, possible anoxia, fatigue, cold, vibration, fear and combat, and the changes in man's internal environment which are made to meet these conditions, are well outlined. In reviewing the composition, pressure and temperature of the air in which man flies, the importance of remembering that altitudes must be expressed as pressure altitudes is stressed—that is, the actual altitude that the altimeter indicates, since the reaction of the body depends on this altitude rather than on a corrected altitude, which takes into account changes in temperature. The mechanics of respiration, gas laws and their application, properties and
Physiology in Aviation. JAMA. 1944;125(1):91. doi:10.1001/jama.1944.02850190093031