1. The cerebrospinal fluid of untreated schizophrenics shows a pronounced selective absorption in ultraviolet at λ= 2650 A.2. Electroshock treatment influences the ultraviolet absorption of the cerebrospinal fluid (initial decrease, followed by increase on repeated application of high A. C.).3. Enzymatic substances apparently belonging to the groups of nucleases and desaminases increase in the CSF following electroshock convulsions.4. Lipases are much less affected by electroshock convulsions than are the nucleases.Abstract Teaser