Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 378
por, at the start, may be formed in two ways.First, the lamp may be tipped so that a stream of mercury makescontact between the two electrodes and mercury is vaporized whenthe stream breaks. Second, by means of a high inductance and aquick break switch; a very high voltage, sufficient to pass… … SIMPLE COMBINATION GAS AND ELECTRIC FIXTURE IN A DINING ROOM
Architecture · Building · Carpentry
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