Boyle's ether, nitrous oxide and oxygen anaesthetic apparatus, from design developed by Henry Edmund Gaskin Boyle to provide a continuous-flow of the gases under pressure, made by Coxeter and Son, London, 1918. Boyle-type anaesthetic apparatus, London, England, 1918
'The Salisbury' dental anaesthetic apparatus, Boyle's type, nitrous oxide and oxygen with halothane vapouriser, by Medical and Industrial Equipment Ltd., 10 & 12 New Cavendish Street, London, W1, England, 1960-1970. 'The Salisbury' dental anaesthetic apparatus