This inhaler appears to be a modification of the original Rendle's inhaler, developed in 1867 by Richard Rendle for use with bichloride of methylene. Rendle's original design was criticised as there was no clear way to regulate the dosage of anaesthetic and it was difficult to clean. Nevertheless, the inhaler was available until 1915. Richard Rendle was the second son of William Rendle (qv), Medical Officer of Health for St George the Martyr, Southwark, London, SE, of whom there is an account in the Dictionary of National Biography. Richard Rendle studied at Guy's Hospital, where he held the posts of House Surgeon, Surgical Registrar, and Demonstrator of Anatomy. He was afterwards House Surgeon at the Seamen's Hospital, Greenwich, and at the Waterloo Road Royal Infirmary for Women and Children, and then Resident Medical Officer at the Brompton Consumption Hospital. Resigning that post, he was put in medical charge of an emigrant ship to Australia, where he remained. He held several posts there: Resident Medical Officer of the Government Hospital, Fremantle; Medical Officer of the Lying-in Hospital and Hospital for Children; also Health Officer at Brisbane. In later years he practised at Taringa, near Brisbane, and died at Taringa, Queensland, on Aug 10th, 1907. The mask for the administration of bichloride of methylene was named after him in the instrument-makers' catalogues. (Source: RCS England, Plarr's Lives of the Fellows)Leather inhalational face mask in a cone shape covered with red flannel on the outside natural coloured linen lining the inside. There is a natural sea sponge inside the cone. A perferated ring sits at the top of the cone, surrounding a circular opening which is formed from metal. There is also a circular opening on the side.richard rendle, bichloride of methylene, guy's hospital, taringa

Between 1867 and 1920, anaesthesia for dental operations was often maintained by blowing the vapour of ether or chloroform into the patients' oral or nasal pharynx. Junker's inhalers are a "blow over" device used with a hand-held bellows to bubble air through liquid chloroform and to the patient. It was initially intended for use with bichloride of methylene, a mixture of chloroform and methyl alcohol. Ferdinand Ethelbert Junker introduced his inhaler in 1867 as appointed physician to Samaritan Free Hospital for Women (although it didn't have that name until c.1904). Glass jar with liquid measure markers etched onto. The jar has a metal lid, with a metal tube descending into the jar. Two metal tubes are protuding out of the top of the lid, and each has a small section of rubber tubing attached. There is also a metal hook, used to attached the jar to the physicians (anaesthetist's) lapel.Stamped into frame of metal lid: LONDON MADEjunker, blow over, chloroform, samaritan free hospital for women