Electricity and magnetism : an elementary text-book, theoretical and practical (1920)
Glazebrook, Richard, Sir, 1854-1935 · Cambridge : The University press · leaf 81
th horsehair, coveredwith an amalgam of tin and zinc with mercury smeared on tothem with a little lard or tallow. To secure good working thecushions should be earth-connected. The connexion affordedby the wood framing of the machine is usually sufficient; inswne cases however contact is obtained by… … Pig. 34. When the machine is in action the friction of the cushionsproduces positive electrification on the glass, negative on theamalgam; the negative escapes to the earth, the positive iscarried forward on the glass towards the combs. As thispositive electricity approaches the combs the prime…
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-176-74.webp)
