Helmholtz's quadrant electrometer, brass with lining of ebonite and tin foil, made by T.R. Voss, Berlin, 1876. Helmholtz improved Kelvin's quadrant electrometer by using Leyden jars made of ebonite or vulcanite rather than glass, which held charge much longer (14 days rather than 1). Needle and mirror could also be easily removed, and needle could be raised or lowered without shaking the instrument. See note.
- Electricity and Magnetism
- Object Number:
- Voss, R.
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.