Seven years have passed since Motchoutkowsky, of Odessa, after using Sayer's apparatus for the application of a plaster jacket to an ataxic patient suffering from Pott's disease, observed an improvement in the symptoms of his patient. Although he published, in the following year, the results of this treatment in sixteen cases of tabes, claiming favorable results in all but two, it was not until Charcot, in January of the present year, lent the weight of his authority to the method, that it attracted any general attention. Since then, observations have multiplied, and it may be considered the fashionable treatment. Although the status of any therapeutic measure in a disease of so protracted and irregular course can only be determined after much more prolonged observation than has been had in most of the cases thus far treated, the reported results have been, temporarily at least, so generally favorable, and the difficulty