The treatment of Pott's disease, or humpback, by immobilization of the diseased joints has long been the accepted method and is accomplished by various mechanical means, such as braces, plaster-of-Paris jackets, etc. That much success has been obtained by these means there is no question. That there is still much to be desired is equally unquestionable, because these various methods, while they limit motion, do not secure absolute immobilization of the diseased joints or entirely relieve pressure on the involved bodies; for this reason it is necessary to continue treatment for long periods of time, and in almost every case the deformity increases more cr less, especially in the dorsal region. It would seem, therefore, that a method of treatment which would absolutely eliminate motion of the diseased vertebræ and entirely relieve pressure on the involved bodies promises more rapid cure of the disease and prevents deformity.
The disease, being