Twenty four electrical radiometers illustrating Sir W.Crookes' research on electrical discharges in a vacuum 1879-1888
Radiometer with small transparent circular vanes and silvered reflector Radiometer with small transparent circular vanes 1800-1899
Radiometer with rectangular cane and pith vanes. Phil trans. vol. 166. part 2 Radiometer with rectangular cane and pith vanes 1800-1899
Automatic Titrator by Radiometer (Denmark) model TTTIB with recorder and control unit, 1960 Automatic Titrator by Radiometer (Denmark) model TTTIB with recorder and control unit
Radiometer on stand with two mica discs (one loose) and two brass arms Radiometer on stand with two mica discs 1800-1899
Lovibond chromoradiometer for the estimation of X-ray dosage in radiotherapy using Sabourand-Noire pastilles, by The Tintometer Ltd., Salisbury, England, 1915-1939 Lovibond chromoradiometer for the estimation of X-ray dosage in radiotherapy using Sabourand-Noire pastilles 1915-1939
Solomon's ionoquantimeter, for measuring radiotherapy doses, by Ropiquet, Hazart and Roycourt, Avenue d'Orleans 71, Paris, France, 1910-1930. Solomon's ionoquantimeter 1910-1930
Radiometer with circular metallic vanes and blue glass supporting standard Radiometer with circular metallic vanes 1800-1899
Radiometer with pentagonal pith vanes on stand, c. 1876 Radiometer with pentagonal pith vanes on stand 1876
Radiometer on stand; etched on glass "No 1277 iron and gold, Oct. 1977" (broken) Radiometer on stand; etched on glass "No 1277 iron and gold 1800-1899
Crooke's Radiometer (dated 1877), signed IRON & PLATINUM OCT 1877: one of the original radiometers by Sir William Crookes Crooke's Radiometer (dated 1877) 1877
Crookes radiometer with four diamond-shaped vanes Crookes radiometer with four diamond-shaped vanes 1965-1979