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.

Details

Category:
Heat
Object Number:
1888-166/1
Materials:
wood (unidentified) and glass
Measurements:
tube: 190 mm x x , 14 mm, .02kg
type:
radiometer (crookes' type) and laboratory equipment (physics)
credit:
Sir William Crookes