Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 364
des is consumed the other is putinto service. With the introduction of the enclosed arcs, thisform of lamp is rapidly disappearing, although a few are stillin use. Fig. 14. 301 20 ELECTRIC LIGHTING Arc lamps are constructed to operate on Direct Current orAlternating Current systems when connected…
Architecture · Building · Carpentry
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