The elements of dynamic electricity and magnetism (1903)
Atkinson, Philip. [from old catalog] · New York, D. Van Nostrand company · leaf 166
ntal tube, by attachment to a metal frameand pulleys, as shown at a, a^ t, t in Fig. 59. This tubeis made of very thin metal, one third of its length beingiron and two thirds brass, to maintain constancy oflength between the points of attachment of the wires bysuch a mode of connection as to… … Fig. 59. convection of the air to which the tube and wire wouldbe liable in a vertical position. The wire has a resistance of about 240 ohms, and at-tains a maximum temperature of about 200° C; and itsexpansion varying in a certain definite ratio dependenton the difference of temperature caused by…
Electricity · Magnetism
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