Glowing Geissler tubes, 1858.

 
Glowing Geissler tubes, 1858.
4 0 c m
 
35cm
actual image size: 27cm x 32cm

Description

Illustration showing electric discharges through gases, from 'Beobachtungen uber das geschichtete electrische Licht' (Observations on the history of electric light) by W H Theodor Meyer, published in 1858. In this pamphlet, Meyer discuses the phenomena associated with Geissler tubes, in which a high-voltage electric current is passed through a gas at a pressure much lower than that of the atmosphere, producing a fascinating glow as the gas is ionised. The tubes are named after Heinrich Geissler (1815-1879), a Bonn glassblower who devised a new pump that produced a much better vacuum than ever before. In 1855 Geissler used the pump to evacuate intricately shaped glass tubes in order to demonstrate this colourful electrical effect.

Image Details

Image Ref.
 
10419162

© Science Museum / Science & Society Picture Library

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