Used by mothers during childbirth, the anaesthetic Trilene (trichloroethylene) was inhaled through a face mask [missing] attached to the rubber tubing [missing] and the vaporising chamber. The Trilene was poured into the chamber to be turned into a vapour. The machine was used in the obstetric wards at University College Hospital, London. Trilene was introduced in the 1940s. The machine was made by Cyprane Ltd.Khaki metal multi layered cylinder. Set on top of khaki metal plate with four (4) rubber feet.Stamped in red on top level of vaporiser: Cyprane Ltd •Stamped in red on serial plate: TECOTA MARK 6 / CHARGE WITH TRICHLOROETHYLENE B.P. / CYPRANE LTD. SERIAL No / KEIGHLEY / YORKS. / T1469 •Clear sticker with red printed text stuck on metal plate: PAT No 646680 / PATENTS PENDINGtrichlorethylene vaporiser, tecota mark 6