IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. J.J. Thomson's cathode ray tube #3, ...
Marked: "3611, Pat. in USA, 3-20-7; 10-8-20; 4-22-24; 6-16-25". Early cathode ray tube with horizontal and vertical deflection plates. Plates are connected directly to filament stem which is cracked ...
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