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  • "System of Electricity" Canton's Electrometer, Henly's Quadrant Antique engraving Pub.1788

Technology electricity Henly's Quadrant Electrometer Atmospherial Rain Electrophorus Antique Print

$42.21

Product Description

PL 89 Technology System of Electricity Alexander Hogg  1788

Caton's Electrometer, Henly's Quadrant, Electophorus

Antique Copper engraving engraved by Barclay, printed on hand made hemp and flax laid paper.

Published "According to an Act of Parliament" by Alexander Hogg, at the Kings Arms No 16 Paternoster Row, London circa 1788

Condition= Very Good, with complete plate mark, no tears/creases, light soiling  across top of page.

Mr. Canton's Electrometer consisted of two balls of cork, or pith of elder, about the size of a small pea, suspended by fine linen threads, about 6 inches long.

Henly's Quadrant/Electrometer: Mr. Henly's quadrant electrometer, fixed upon a small stand, from which it may be occasionally separated, and fixed upon the prime Conductor

Plate mark = 23.5 x 38 cm (9.4 x 15.2 inch)

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