Kruse and Schaetz report a study of nine cases of patients in institutions who came to autopsy for whom encephalograms had been made in the course of study and treatment. These cases included six of hydrocephalus, one of tumor of the brain and one of pachyminingitis interna haemorrhagica.
The postmortem studies were carried out in a fashion designed to maintain the relations of the skull to the enclosed brain, in order to check completely the encephalograms. This was done by hardening the brains in situ by the injection of solution of formaldehyde, and later making gross sections of the entire head. The encephalograms were found to have given an accurate picture of the intracranial changes later noted in the sections.
The authors recommend such checkups when opportunity offers, both as a means of further evaluating encephalographic studies and as a way of better understanding the cerebrospinal fluid system and its