| 11. | The first " Klieglight " was a powerful carbon arc light designed for the motion picture industry.
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| 12. | Carbon arc lamps consist of two carbon rod electrodes in open air, supplied by a current-limiting ballast.
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| 13. | Some of his scientific endeavors after the war carried on with themes related to the carbon arcs.
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| 14. | In the 1920s, carbon arc lamps were sold as family health products, a substitute for natural sunlight.
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| 15. | The electrodes employed for twin-carbon arc welding are approximately of the same diameter as the workpiece thickness.
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| 16. | The English engineer William Duddell discovered how to make a resonant circuit using a carbon arc lamp.
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| 17. | It retains early carbon arc projectors.
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| 18. | The invention of the electric arc furnace probably began when Humphry Davy discovered the carbon arc in 1800.
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| 19. | In 1865, John Tyndall described radiation from electrically heated filaments and from carbon arcs as visible and invisible.
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| 20. | The company's product range included dynamos, lifts, carbon arc lamps, electric traction motors for trams and drilling equipment.
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