Abstract
The following analysis is a statistical study of the pressure, color, protein content, cells and colloidal gold reaction in a series of sixty-seven cases. The diagnosis was determined in all except two by operation or at autopsy. In these two cases, a pituitary tumor and a meningioma, clinical evidence makes the diagnosis quit certain. From a study of the records I am satisfied that the fluid analyses were made at a time when cerebral disease was present, although in some cases considerably earlier than operation seemed warranted. Many of the patients were personally known to me, and uniform technic both during the puncture and in examination of the fluid was the rule. It may be stated here that the Wassermann reaction was uniformly negative in all cases, with a single exception which on repeated examination was shown to be a mistake, nor did the pathologic changes in any case suggest

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