Replica of glass object in Royal Institution collection: Dewar double annular jacketed vessel completed by Scientific Supplies Co. Ltd. and Museum Workshops, London, England, 1932. Replica of Dewar Double-Annular Jacketed Vessel, 1932 1932
Invar rod no. 8858, 45-inches long and 8 mm diameter, with N.P.L. certificate dated 7th May 1912 (mean coefficient of linear dilatation between the temperatures 0.6°C and 30°C is 0.0000000 per 1°C). Invar Rod, 1900-1912 1900-1912
Boy's apparatus for determining the mechanical equivalent of heat by The Cambridge Scientific Instrument Company, Cambridge, England, 1884. From The Physical Laboratory of the Science and Arts Department, South Kensington. Boy's Mechanical Equivalent of Heat Apparatus, 1884 1884
Radiometer used to illustrate Sir William Crookes' researches on the radiation of heat in high vacua: radiometer with semi-cylindrical vanes, 1872-79. Crookes' Radiometer, 1872-1879 1872-1879
Radiometer used to illustrate Sir William Crookes' researches on the radiation of heat in high vacua: pith-ball balance in air (the balls are attracted if a flame is brought near), 1872-79. Crookes' Radiometer, 1872-79 1872-1879