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Danish Instrument Inventory text:

Discharger, Henley's. Mahogany base 390x100. 2 glass pillars Dia23 H250 ending in brass fittings with sliding brass rods in universal joints. The brass rodsend in brass spheres to form the spark gap over a central wooden platform Dia120 on expandable wooden pillar with ivory set screw. Ivory foot Dia43 with slit to hold sheet material and place on the central platform for penetration by discharging.2 mahogany presses seem to belong. Each with 2 pieces of wood pressed together by finger screws. One with brass, the other with wooden screws.Not signedc1800 (g)

• Category: Electricity
• Hauch number: K073b
• Inventory number: 7262
• Danish Instrument Inventory number: 2084

• Hauch references:
• Begynd.grund: §0
• Cabinet 1: 0

• Literature:
• The King George III Collection: E213

• Henley(1778)

  Gehler(1787-96) I p.220 pl.III fig.34

  Adams(1794) IV p.I fig.15

  Cavallo

  Cuthbertson(1807) p.64-79

  Gehler(1825-45) I p,645 fig 100