In previous reports I have shown that Ménière's disease and pseudo-Ménière's disease could be cured by section of the auditory nerve or equally well of the vestibular branch alone. The series of operations has now reached 170 in 160 patients, ten being bilateral. There has been no death and, except for four early facial palsies, no after-effects in the unilateral cases. There are few diseases so easily diagnosed and so perfectly curable. Like trigeminal neuralgia the cure of Ménière's disease has antedated the disclosure of its underlying cause. Since the disturbances (chiefly recurring attacks of dizziness in which objects rotate) do not in themselves produce death, pathologic material is exceedingly scarce. Ménière's original description of "a serosanguineous exudate1in the semicircular canals" was not from a case of Ménière's disease as was supposed but from a case of acute purulent labyrinthitis—an acute infectious disease having no clinical resemblance whatever