Abstract
The changing conditions of life bring about corresponding changes in the development of pathologic and physiologic processes. The period of starvation in the United States of Soviet Russia from 1918 to 1920 is a typical instance. There was a complete disappearance of disturbances of metabolism, gout and excessive obesity, and an increase in scurvy and tuberculosis. The menses of a great many normal women ceased (Chalatov 1 ). The cases which I discuss in this article are similar. Since the people of U. S. S. R. have taken an interest in physical culture, sun baths, which were seldom indulged in before, have become popular. They have great influence on the development of pityriasis versicolor, a rather common disease among the inhabitants of cities. From the beginning of 1923, I observed in Tashkent (40° 19' north longitude and 71° 16' east latitude) and Kiev (50° 27' north longitude, 30° 30' east latitude)
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