Abstract
THE Electrician of July 4 quotes Mr. S. G. Hibben, director of applied lighting to the Westinghouse Lamp Division, as attributing most of the very rapid progress being made in developing illuminants to the influence of the large ‘fairs’ recently held in the United States. Each exhibition has been identified with some new and often radical means of producing light. The Panama–Pacific Exposition of 1915 ushered in the use of tungsten filament lamps of large wattage for exterior floodlighting, and coloured beams from carbon–arc searchlights. In 1926 the Philadelphia Sesqui–Centennial Exposition presented colour–coated incandescent filament lamps with spirally coiled filaments surrounded by inert nitrogen and argon, in sizes down to and including the commercial 60–w. lamp. High voltage (10,000 volt range) neon and mercury tubing for architectural decoration were also used. The high–intensity mercury vapour lamps were publicly introduced into the United States at the Chicago Century of Progress Exposition in 1933.
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Making Light for To-morrow. Nature 148, 164 (1941). https://doi.org/10.1038/148164a0
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DOI: https://doi.org/10.1038/148164a0