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It is not the purpose of this article to discuss the merits or advantages of the different methods of producing anesthesia by the inhalation of the vapor of ether. Whatever advantages may be claimed for the semi-open method or for the closed method, a large number of surgeons and anesthetists prefer the open method, which, to be of advantage, must be conducted by droping the ether for inhalation rather than by pouring it into the inhaler. The number of those who prefer this open drop method is increasing, and while inhalers for the other methods are in abundance and modifications of the old ones are constantly being made, little has been done in the development of an inhaler for the open drop method.
Dr. Laplace, of the Medico-Chirurgical Hospital in Philadelphia, devised an inhaler for this method and deserves credit for the ingenuity manifested in producing so excellent an apparatus,
FERGUSON RH. AN INHALER FOR ETHERIZATIONBY THE OPEN DROP METHOD. JAMA. 1905;XLV(27):2014–2015. doi:10.1001/jama.1905.52510270020003
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