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Complete with clear dust cover
this fine sextant features an adjustable index arm
Rack & pinion focus mechanism
Dimensions: 37
This instrument was a first for sensitive and quantitative electrical data
Wimshurst Influence Machine enamel Complete with clear dust coverInvented by British inventory, James Wimshurst, between 1880 1883. An electrostatic generator that develops high voltage, it as 2 counter rotating discs mounted vertically and 2 bars with brushes that rub against evenly spaced metallic strips mounted on each of the discs. Static electricity is produced when the discs rotate. This is stored in 2 lyden jars. Two electrodes leading from these lyden jars can be moved and the distance between them varied.
