Electricity for public schools and colleges (1891)
Larden, W. (Walter), b. 1855 or 6 · London : Longmans · leaf 251
he wire on to the cylinderB where it is insulated, and so throw more or less of it into thecircuit. That portion of the wire which is on A gives no appre-ciable resistance, being then practically part of a very thick brassconductor. By noticing against what mark on the graduated scale (seen inthe… … Fig. i. CH. XIV. MEASUREMENT OF RESISTANCES 225 We can use this instrument in two main ways, I. Method of substitution.—In the figure, R is the rheostat ;7/1 in are two mercury cups between which either the unknownresistance x, or a thiclccopper piece of no resist-ance, can be inserted ;and G IS a…
Electricity
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
