Copy of the Squire-type ether inhaler first used in 1846
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An agent that causes insensitivity to pain. Applied to either the whole body (general anaesthetic) or a particular area or region (local anaesthetic).
A device for breathing in a drug in order to deliver it to the airways or lungs.
A volatile liquid (resulting from the action of sulphuric acid upon alcohol) formerly used as an anaesthetic. Ether was usually inhaled.