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In December, 1920, the Association for Research in Nervous and Mental Diseases held its first meeting; two days were devoted to the study of lethargic encephalitis. There were thirty-five contributors, to each one of whom some branch or phase of the subject had been assigned by the Commission of the Association because of his known attainments. There was no general discussion of the papers presented, but the contributor was expected to defend his thesis, if necessary, and to answer all questions.
The total output of the conference was taken in hand by the Commission, sifted and arranged; duplications were eliminated and superfluous matter deleted. What was left was put into book form by the Publication Committee. The material is arranged in seven chapters and covers the subject from history, incidence and etiology through symptomatology (three chapters), diagnosis, prognosis, morbid anatomy and bacteriology to animal experimentation and immunology. The book certainly