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Bulb and wiring not included
Source: 1919 Tyco's Industrial Equipment Catalog (page 74)
allowing for a visible measurement to be taken
First invented by Abraham Bennet in 1786
Dimensions: 12
Antique Harris-Style Gold-Leaf Electroscope monocular Bulb and wiring not includedEarly 20th century Harris Style gold leaf electroscope. A fine single leaf electroscope used to demonstrate electrostatic charge. Mahogany housing with lacquered brass components, Bakelite insulator, and gold leaf indicator. A pristine, custom build. Unsigned, English made. First invented by Abraham Bennet in 1786, this Harris style electroscope is more sensitive and advanced in comparison to the older pith ball style electroscope. The device works
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