Scientific American. [SEPTEMBER 23, 1878. 178 |tive. When the wires are properly connected and the car- [Continued from first page.] much, and to make the small point appear as large as possible, down until the two carbons meet. tablishes the voltaic arc, when the light comes out in all its… … or downward direction, and from this reflector two rows of prisms are suspended. One half of the prisms are ar- ranged with their flat side to the light, and the other half greater, its power to excite the electro-magnet corresponding- lave their angular side toward the light. Below the focus is a…
Internet Archive · Public domain (published before 1931). Free to use for anything.
