The item was donated by Dr K McCaul of the Royal Women's Hospital, Melbourne, in 1966.Anaesthetic trilene was administered to the patient via rubber tubing from the Trilene inhaler, within which the anaesthetic was converted into a vapor. The cylindrical metal apparatus sits atop a flat, square stand with four black rubber feet. Item includes ports and valves for connection to a face mask and vaporising chamber, as well as mask attachment and metal pouring jug with spout.Red markings identifying the manufacturer and the measurement scale are located on both the stand and top twist dial. The base of the mask attachment piece is inscribed with the manufacturer's details: 'Cyprane Ltd'. The metal beaker is engraved with a line marked at the 15cc level. trilene inhaler, tecota, anaesthesia, beaker, mask, vaporise, obstetrics, childbirth, dr k mccaul royal women's hospital melbourne, 1966, vapor, face mask, vaporising chamber, cyprane ltd, keighley