Model hospital sterilizer or autoclave, English, c 1935.
© Science Museum / Science & Society Picture Library
A chromium-plated autoclave, made by Chas F Thackray Ltd of Leeds and London. It was probably used by travelling salespeople for demonstrations. Autoclaves were invented in the 1880s to sterilize instruments with high presure, super heated steam. Surgical instruments were nickel or chrome plated to withstand this.