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While one lyden jar is slightly compromised
An electrostatic generator that develops high voltage
Featuring a wooden lunar volvelle and equatorial sun and moon dial
Dimensions: 8
Early 'Heliochron' Pantochronometer trial frame While one lyden jar isA Rare early 19th century Pantochronometer hand engraved 'HELIOCHRON' on lid. Complete original. Dome cased brass sundial compass with floating paper face and fixed brass gnomon. Pantochronometers were first developed in the late 1700's, and widely popularized in 1820 by Samuel Porter. A fine, functional, scarce, and early example. Circa 1830. Diameter: 4. 5 cm. Height: 3 cm. Weight: 1. 7 oz.
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