Allen, Charles Ricketson, 1862- [from old catalog] · New York, H. Holt and company · leaf 238
ed formeasurement. The resistance of the wire per cm. is determinedby measuriug the resistance of four or rive lengths and averagingthese values, and lengths required to form coils of any desiredresistance are then measured off. Contact can be secured byswitches or by some other device, such as the… … Fig. 108. The rack with wires described on p. 231 may be converted intoa resistance-box by determining the resistance of 1 cm. of theG. S. wire. Get the resistance of a number of lengths, and taketheir average value for the resistance of 1 cm. Enter this valueupon a card attached to the instrument.…
Physics
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