PAUL D STEWART / SCIENCE PHOTO LIBRARY PAUL D STEWART / SCIENCE PHOTO LIBRARY
Gas" From "The Anniversary of the Literary Fun (1836) by Thomas Hood, published by Baily and Co, Cornhill. Humphrey Davey examined Nitrous Oxide and published his results in "Researches Chemical and Philosophical" (1800). Davy noted that it had an analgesic effect and had potential to be used for surgical operations. Despite that laughing gas was not used for a dental operation until 1844 - instead it was used as a recreational drug at "laughing gas parties" among the upper classes.
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