cases this method has grown more and more simple as time has gone on. In the first place, in my own mind, the number of displacements which have a pathological significance has reduced itself to two, retrodisplacements and prolapse. The first will include retroversion and retrollexion, inasmuch as it is rarely The legitimate use of electrotherapeutics has been largely monopolized by neurologists, the work of Duchonne, Tripier, Erb, Lewandowsky,