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The author tells us that he is not going to add another to the already great number of experimental studies on the problems of sleep. He would cultivate but a sector of this assemblage, and that relates itself to the clinical and prophylactic aspects of the situation, hydrotherapy being especially accented. In order however to afford a foundation, he reviews some of the underlying studies, thus offering a rapid summary of a few of the leading hypotheses and theories, chiefly of the physiologic schools. Thus there are brief references to the work of Hess, of Pavlov, of von Economo and of a few others of less significance. Almost apologetically, Freud's conceptions are given in smaller type, and at the end of four pages the astonishing statement is made that the freudian contributions offer no extensive study of sleep as a psychologic problem (p. 28). As only Freud's 1930 "Lectures" are
Die Prophylaxe der Schlafstörung. JAMA. 1937;108(17):1460. doi:10.1001/jama.1937.02780170078032