A manual of electricity, magnetism and meteorology (1844)
Lardner, Dionysius, 1793-1859, Walker, Charles Vincent, 1812-1882 · London Longman, Brown, Green & Longmans · leaf 101
glass pillars, A A, are attached. At the summits ofthese pillars are fixed two brass joints capable of re-volving in a horizontal plane. To these joints are at-tached brass rods, C C, terminated in balls, D D, andhaving glass handles, E E. These rods play on jointsat B B, by which they can move in…
Atmospheric electricity · Electricity -- Early works to 1850 · Magnetism
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
