what persistent purulent discharge. The hearing then became normal, and it has since remained perfect in both ears. CASE II.-My next case of double exostosis, sent to consult me by Dr. Symes Thompson, was that of a naval gentleman, Mr. A. S., aged 31, who, like the preceding and my two next cases, had been accustomed to regular sea-bathing. He had suffered from earache from time to time, for as long as he could remember. It was in 1866 that he first found himself growing deaf, and, after some

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... , and, after some years, his hearing became so seriously affected that he found himself necessitated to retire from Her Majesty's se-rvice. On examination, December 17th, 1879, I found each meatus to be closed by a large ivory exostosis arising from the posterior wall. Five operations-two for the right ear, in January and February, and three for the left, in March and April-were required for the efficient perforation of the tumours, the total time occupietd being 3 hours 40 minutes. In the 'last operation, the abs'ence of an assistant was, in all probability, the cause of an accident which, although its effects were soon averted, might have been serious. The guard, which I was compelled to hold as I worked with the dental engine, slipped, so as to allow a slight swerving of the drill, and the membrana tympani was injured. A little Paralysis ensued, indicatory, no doubt, of injury to the facial nerve. The final result in this case, 'a in, the last, was eminently satisfactory, the patient completly recovering hi aing.