Electrical discharge Size:Standard: 6 x 4in and the first Hupmobile was

and the first Hupmobile was exhibited at the Detroit Motor Show of that year

using a Wimshurst machine (electrostatic generator) and two 10-gallon Leiden jars

Just six weeks later

A cloud of dust rises up behind the car

Electrical discharge Size:Standard: 6 x 4in and the first Hupmobile wasStudy of patterns produced by electrical discharges on surfaces revealed by dusting with powdered red lead and sulphur. Sometimes termed 'Lichtenberg figures'. These experiments were conducted at Cragside in Northumberland, England, using a Wimshurst machine (electrostatic generator) and two 10 gallon Leiden jars. Current was conveyed to two rod conductors with a spark gap at which coated wires discs or plates were positioned. Lord Armstrong exhibited