Elementary treatise on electricity and magnetism : founded on Joubert's "Traité élémentaire d'électricité" (1909)
Foster, G. Carey (George Carey), Porter, Alfred William, 1863-1939, Joubert, Jules François · London : Longmans · leaf 516
Fig. 315. Fig. 31G. value for aof mercury 494 RESISTANCE BOXES [374- A thermometer in the box containing the wire indicates the tem-perature. 375. Resistance Boxes.—It is necessary to have at our dis-posal a series of resistances, the values of which increase regularly.They consist ordinarily of…
Electricity · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer01inte-142-49.webp)