Metcalf, however, to whom we owe the classic description of the Concord epidemic, believes that this is not the case, and that acute epidemic acidosis in children is a separate clinical entity with a definite, though unknown, infectious etiology and symptomatology. The subsequent study and comparison of data gathered in this present epidemic, may afford positive aid in the determination of this important question. At the present writing, fortunately, the acidosis epidemic appears to be at an

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... ,* and the pandemic of respiratory infections seems to be losing its extent' and virulence. A period of generalized immunity should succeed so .widely