Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 381
< HMQ ELECTRIC LIGHTING 33 Fig 27 is a diagram of a lamp connected for starting by thequick-break method, while Fig. 28 shows two 55-volt lamps con- MAIN S- LAMP -vWVW QUICK-BREAK SWITCH[RESISTANCE smmm. STARTINGBAND INDUCTANCE COIL 9^- + Pig. 27. nected in series on a 110-volt circuit, and… … Fig. 28. The mercury vapor lamp is not made in small sizes for ordi-nary voltages, and its light is very objectionable for the purposeof distinguishing color, as there is an entire absence of red rays. S15 34 ELECTRIC LIGHTING This absence of the red light makes the illumination one that isvery…
Architecture · Building · Carpentry
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