On the Use of Protoxide of Nitrogen Gas; and on a New Mode of Producing Rapid Anæsthesia with Bichloride of MethyleneBr Med J 1869; 2 doi: https://doi.org/10.1136/bmj.2.459.412-a (Published 16 October 1869) Cite this as: Br Med J 1869;2:412
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