Les vertiges labyrinthiques.

This monograph on labyrinthine vertigo is quite complete. Beginning with a description of the anatomy of the vestibular apparatus, the physiology is then discussed, including the theories of Mach and of Breuer, and the experiment of Ewald. The author then recites the mechanical factors that may bring about vertigo. A detailed description of the functional testing of the semicircular canals is followed by a discussion of the differential diagnosis of the various types of vertigo. The treatment given is both medical and surgical. The former consists largely of bromides; the latter includes various types of operations that have been suggested by Botey, Hauton, Diehl and Crockett. The author states that these operations are really not as dangerous as one would naturally suppose, but this must be taken with a "grain of salt." The work is very compact and is written with the usual clarity of style for which most French