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Start Over You searched for: Subjects Anesthetics, Inhalation Remove constraint Subjects: Anesthetics, Inhalation Publication Year 1800 to 1899 Remove constraint Publication Year: <span class="from" data-blrl-begin="1800">1800</span> to <span class="to" data-blrl-end="1899">1899</span>

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17. Before the Commissioner of Patents, in the matter of extension of letters patent of the United States, granted to William T.G. Morton, on the 12th day of November, 1946, for "An improvement in surgical operations": statement and account, pursuant to section eighteen of the Act of Congress, passed July 4, 1836