A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 531
ircuit. The sounder (Fig. 274) consists of an electromagnet, m, a lever I, pivoted at v and carrying a piece of soft iron i, 505 506 PHYSICS which iron attracted by the electromagnet, is drawn down-ward, stretching the spring s, and bumping the end of thelever against the lower stop. It is this… … Fig. 274. groups of dots and dashes indicate the letters of the alpha-bet. In the following table a dot is indicated thus, -, anda dash thus, —. The table is called Morses alphabet, fromits inventor, an American (1791-1872), who was one of theforemost leaders in the development of telegraphy. A- J…
Physics
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
