pith-ball electroscope
Date: 1850-1900
Inventory Number: 1997-1-1347
Classification: Electrostatic Apparatus
Dimensions:18.5 × 8.4 × 8.4 cm (7 5/16 × 3 5/16 × 3 5/16 in.)
Description:
Brass column upright on a brass circular base with a sphere on top. Hook at the top holding a string with a pith ball.