Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 167
Flu. 37. Ktiil-KwNl MtN-liiiiiLMii. 131 38 ELECTRIC LIGHTING TYPES OF ARC LAMPS Arc lamps are constructed to operate on direct-current or alter-nating-current systems when connected in series or in multiple. Theyare also made in both the open and the enclosed forms. By an open arc is meant an arc…
Architecture · Building
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