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Replica of Vacuum Vessel Sealed with Wax, 1930

1930

Crookes' Radiometer, 1872-1879

1872-1879

Crookes' Radiometer, 1872-1879

1872-1879

Crookes' Radiometer, 1877

1877

Replica of Early Dewar Heat Insulation Vessel, 1932

1932

Crookes' Radiometer, 1872-1879

1872-1879

Crookes' Radiometer, 1872-1879

1872-1879

Dewar Vacuum Vessel with Charcoal, 1906-1914

1906-1914

Crookes' Radiometer, 1877

1877

Replica of Early Vacuum Flask with Glass Seals, 1930

1930

Differential Air Thermometer, 1894

1894

Fire Syringe Demonstration Apparatus, 1894

1894

Convection Mill Physics Apparatus, 1919-1928

1919-1928

Vacuum Cup, 1877-1900

1877-1900

Crookes' Radiometer, 1872-1879

1872-1879

Domestic Vacuum Flask, 1945-1955

1945-1955

Ritchie's Radiation and Absorption Apparatus, 1851-1900

1871-1989

Vacuum Cup, 1877-1900

1877-1900

Crookes' Radiometer, 1872-1879

1872-1879

Replica of Vacuum Vessel with Mercury Trough, 1930

1930

Crookes' Radiometer, 1876

1876

Crookes' Radiometer, 1872-1879

1872-1879

Crookes' Radiometer, 1872-1879

1872-1879

Crookes' Radiometer, 1872-1879

1872-1879

Crookes' Radiometer, 1878

1878

Dewar Vacuum Vessel, 1877-1900

1877-1900

Vacuum Unit from Sir James Dewar's Research Vacuum Apparatus, 1877-1900

1900-1982

Replica of a Dewar Metal Vacuum Vessel, 1931

1931

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

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

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