Folder originally containing test pastiles measuring X-radiation; English and French instructions, comparison tints; all pastilles used. Sabouraud & Noire Radiometer X
Crookes-type radiometer with two circle-shaped vanes contained in a spherical-shaped glass bulb. Mounted on circular dark wooden stand. radiometer
Nimbus 6 radiometer (engineering model) plus electronic test rack, Marconi, England, 1973-1975. Nimbus 6, Pressure Modulation Radiometer, 1973-1975 1973-1975
Nimbus 4 Radiometer, optics housing plus electronics module (flight space), 1968-1970 Selective Chopping Radiometer, 1968-1970 1968-1970
Crookes-type radiometer. Contains two vanes of a rectangular shape contained in a spherical-shaped glass bulb. Mounted on circular dark wooden stand which has a crack in it. radiometer
Crookes-type radiometer with spiral-shaped vane contained in a cylindrical shaped glass bulb. Mounted on circular dark wooden stand. radiometer
Crookes-type radiometer with two circle-shaped vane and two half-moon shaped vanes contained in a spherical-shaped glass bulb. Mounted on circular wooden stand. radiometer
Holzknecht chromoradiometer, for measuring radiotherapeutic doses, probably German manufacture, 1905-1930. Holzknecht chromoradiometer 1905
Meteosat radiometer development model, with stand, European, 1975-1977. Meteostat Radiometer Development Model, 1975-77 1975-1977