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 237
Fig. 128. … Fig. 129, Fig. 130. piles are connected together, the couples being insulated by micaor asbestos, which is not altered by heat; they thus form a rect-angular parallelopipedon (Fig. 130), the faces c and D being thosewhich correspond to the junctions. These faces are covered withlamp-black, and…
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-electricengineer03inte-73-20.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-125-104.webp)
