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June 18, 1927


JAMA. 1927;88(25):1968-1969. doi:10.1001/jama.1927.02680510026011

Man is exposed to marked variations in his atmospheric environment through seasonal changes such as occur naturally in the temperate zones or through changing elevation in a tropical climate. These undoubtedly have some effect on his health and efficiency, and temperature and humidity have come to be regarded as the most influential factors associated with the atmospheric conditions. Man's atmospheric environment may be further altered, however within doors through influences brought about by artificial conditions of living and working, whether in the home or in the industries. There are numerous occupations involving exposure to extremes of heat and cold, dampness and sudden changes. Out of several hundreds of such industrial conditions that have been listed,1 the following will serve to illustrate the diversity of fields in which the problems of abnormal atmospheric working conditions are likely to present themselves: makers of artificial ice, caisson workers, coke-oven workers, cold-storage plant