Accession No

5749.4

Brief Description

hemispheres from Boit’s apparatus that forms part of an electrostatic set accompanying the Van de Graaf generator Wh5748, by Philip Harris Ltd., English, 20th Century

Origin

England; Birmingham

Maker

Philip Harris Ltd.

Class

physics

Earliest Date

1920

Latest Date

1999

Inscription Date

Material

metal (brass); plastic (ebonite)

Dimensions

diameter 105mm

Special Collection

Provenance

Donated by Anglia Polytechnic University (now Anglia Ruskin University), Cambridge, on 10/09/1999.

Inscription

Description Notes

hemispheres from boit’s apparatus that forms part of an electrostatic set accompanying the Van de Graaf genrator Wh5748. 20th Century. To show that electrical field does not penetrate the surfaces of the conductors which form its boundaries. Two large brass hemispheres fitted with insulating handles of ebonite. To complete the boits apparatus there would have also been an insulated metal sphere with a hole at the top for a proof plane (this was not with the set).

Condition good

References

Events