In a previous paper published in the Journal for July, 1938, the vitamin C content of the urine of 50 psychotic patients was estimated. Although it was found that the urine content was on the low side, no definite conclusion could be reached as to whether there was any correlation between the form of mental disorder and the deficiency of vitamin C. Since that time the urines of another 256 patients have been examined, which, together with the original 50, make a total of 306.