The standard electrical dictionary : a popular encyclopaedia of words and terms used in the practice of electrical engineering (1898)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · London : Crosby Lockwood and Son · leaf 222
lines of force, whichlines always tend to take as shorta course as possible and also seekthe medium of the highest per-meance. This causes them toconcentrate in iron and steel orother paramagnetic substance and to draw them towards a magnetby shortening the lines of force connecting the two. It is… … Fig. 149. Electro-magnet, Hinged. 2i8 STANDARD ELECTRICAL DICTIONARY. the case of simple currents, those in the same direction attractand those in opposite directions repel each other. This refers toconstant current reactions. Thus the attraction of unlike poles oftwo magnets is, by the Amperian…
Electricity
Internet Archive · Medical Heritage Library · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-97-69.webp)