[Electric engineering.] . of Weston instruments used for switchboard work. Thevoltmeter V and ammeter M are mounted in iron cases, and the dial is ruledon opal glass, whichis illuminated frombehind by means ofincandescent cheaper style, orround type, with-out illuminated dials,is shown by the am-meters «, a. The volt-meters have a high-re-sistance coil mountedin the case and con-nected in series with. 17 ELECTRIC LlGHTINCx. 11

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Keywords: ., bookcentury1900, bookdecade1900, bookidelectricengi, bookyear1902