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William TG Morton's early ether inhalers: a tale of three inhalers and their inscriptions.

Three ether inhalers with inscriptions stating that they had been used in early ether anaesthesia were found. All three inhalers were initially linked to WTG Morton. Two of the inhalers were probably among several types of inhalers used by Morton. The third inhaler was found to have been incorrectly attributed to Morton. It was first used by John Foster Brewster Flagg, a dentist in Philadelphia.