Early 'Heliochron' Pantochronometer trial frame Early 20th Century (circa 1920)

Early 20th Century (circa 1920)

An electrostatic generator that develops high voltage

Both included in their original wood cases

Weight: 4 lbs

While one lyden jar is slightly compromised

Early 'Heliochron' Pantochronometer trial frame Early 20th Century (circa 1920)A 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.