Display picture showing Joule's original apparatus for determining the mechanical equivalent of heat. Display picture showing Joule's original apparatus
Unused giant cone: 4 (1220°C), one of four, by Wengers Ltd., Stoke-on-Trent, England, 1901-1931. Unused giant cone: 4 (1220°C)
Sea surface thermometer by L. Casella, London; Kew No. 68685; bulb missing. Wellcome No. B944 Sea surface thermometer by L. Casella