An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 528
b rather than as an important public servicerequiring the highest engineering skill. Both arc lamps and incandescent lamps are now used ex-tensively in street lighting. Large units, such as the electricarcs of carbon, flame, and metallic oxide, are most effectivewhen suspended at a height of from… … Fig. 334. — Statue of Liberty illuminated at night by means of 15 batteries offlood-lighting projectors using 250-watt tungsten lamps. ELECTRIC LIGHTING 473
Electricity · Magnetism
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