Discovery by the late Dr. Horace Wells of the applicability of nitrous oxyd gas, sulphuric ether and other vapors in surgical operations : nearly two years before the patented discovery of Drs. Charles T. Jackson and W.T.G. Morton.

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Discovery by the late Dr. Horace Wells of the applicability of nitrous oxyd gas, sulphuric ether and other vapors in surgical operations : nearly two years before the patented discovery of Drs. Charles T. Jackson and W.T.G. Morton. Public Domain Mark. Source: Wellcome Collection.

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