Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 376
ed to quite an extent where the quality of thelight is not of so muchimportance. In thislamp, mercury vapor,rendered incandescentby the passage of an elec-tric current, forms thesource of light. Oneelectrode is formed ofmercury and the othermay be of mercury oriron. In the more com-mon type of… … Fiff. 2G. For 100 Volts.43 inches.50 inches.1 inch. For 120 Volts. 49 inches. 5G inches. Lenp^th of light-giving tube Length over all Diameter Current 3 to 3.5 amperes.Candle Power at 120 volts, 750.Life (average), 1,000 hours. The mercury vapor, at the start, may be formed in two ways.First, the…
Architecture · Building · Carpentry
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