What they knew and how they used it in 1879 you can find in "The Advantages and accidents of artificial anaesthesia: a manual of anaesthetic agents, and ..." by Laurence Turnbull , starting page 206 https://archive.org/details/advantagesandac00turngoog
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branchandroot
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Date: 2025-04-26 08:09 pm (UTC)https://archive.org/details/advantagesandac00turngoog