Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1902)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 259
sure the potential dif-ference between a trolley line and the track which is about 550volts, and only a 150 volt instrument is available. Connect five 110-volt lamps in seriesand to the track and line, andparallel the voltmeter Mdtheach lamp respectively. Thesum of the voltages acrosseach lamp… … 30 VOLTS Fig. 215.—Measuring the VoltsDrop with a Voltmeter, resistances of 2, 3, 4, and 6 ohms respectively, are connected in ser-ies and to a battery. The spools may represent lamps, magnets, or MEASUREMENT OF PRESSURE. 241 6 VOLTS DROP
Electricity · Magnetism
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