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Title: Engraving depicting a Geissler tube
Caption: Engraving depicting a Geissler tube, an early gas discharge tube used to demonstrate the principles of electrical glow discharge, similar to modern neon lighting. Invented by Heinrich Geißler (1814-1879) a German glassblower, physicist and inventor. Dated 19th Century
Credit: Album / World History Archive
Image size: 5667 × 3701 px | 60.0 MB
Print size: 48.0 × 31.3 cm | 2231.1 × 1457.1 in (300 dpi)