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Inventory no. 93441 - Former Display Label

English MEDICAL FRICIONAL GENERATOR and ACCESSORIES
1786

Unsigned, but sold by G. ADAMS.
GENERATOR
Brass box with worm gearing and vertical axle ending in a glass cylinder; brass spring support with small rectangular cushion and pressure regulating screw. Separate brass cylindrical prime conductor ending in a collector with 3 points, supported by shaped glass pillar and turned mahogany base.
LANE ELECTROMETER MOUNTED ON LEYDEN JAR
Conventional Leyden jar with inner and outer tin foil coatings, central brass discharging rod in contact with inner coating and supporting the brass horizontal sliding electrode.
CUP
Turned boxwood, inside coated with red sealing wax varnish, with stem and brass disc.
SPANNER
Two MEDICAL DIRECTORS
ACCOUNT made out on the 16th October 1786 and signed by John Birch. George Adams, Jnr. (1750-1795) was a well-known London instrument maker. The buyer was, probably, Dr J. Birch (1742?-1815), author on electrotherapy who founded an electrical department in St. Thomas' hospital, London, in 1793, and who wrote a letter to G. Adams on medical electricity which was included in the latter's book on electricity.

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