Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 414
w YorkCity and described in The EleclricalWorld. It consists of a captive balloonlighted from within by a 500 watt tung-sten lamp, and the envelope of theballoon is said to form an excellent diffu-sing surface. The illuminated sphereis about 20 ft. in diameter, and is aprominent feature., visible… … Modern Illuminants and Effective Shading. A RECENT number of Public Healthcontained a paper read by Dr. MeredithYoung, Medical Officer of Health forCheshire. Dr. Young pointed out theincreasing brilliancy of modern illu-minants and the need for care in theiruse. He remarks :— With the advancement…
Lighting
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