Lessons in practical electricity; principles, experiments, and arithmetical problems, an elementary text-book (1903)
Swoope, Coates Walton. [from old catalog] · New York, D. Van Nostrand company · leaf 443
to incandescence by passing an electric current throughit. The action deposits carbon on the filament and if somepoints are of a higher resistance than others, their tempera-ture will be correspondingly higher and more carbon will bedeposited at such places. Measuring instruments are insertedin… … in wires and is secured to them by a paste of carbon andmolasses. The platinum wires, P, are sealed in the end of aglass tube, A, Fig. 383, which is sealed into the blown glassbulb of the ordinary shape. The upper end of the bulb terminates in a glass tube which isconnected to the air pump.…
Electricity · Magnetism
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