In the Neurologisches Centralblatt for July 15th, 1898, Drs. Luithleu and Sorgo describe a method of staining the central nervous system, which at that time I believed to be new. However, Dr. Wright, in the summer number of Brain for the same year, and therefore about the same time, referred to, without describing the same method, so that it is obvious that it had already claimed some attention from neurologists.