Early inhaler for ether anaesthesia, 1847-1848.
This inhaler for anaesthesia consists of a glass vessel that contains ether soaked sponges and is connected to a facemask by tubing. The mouthpiece has inspiratory and expiratory valves. Air would be drawn through the bottle and over the sponges as the patient breathed in. The inhaler was made by Weiss of London and is inscribed with the name �Letheon�. Letheon was a name adopted for ether during W T Morton�s unsuccessful attempts to conceal its identity and retain control of its use in the 1840s.
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