Inventors at work, with chapters on discovery (1906)
Iles, George, 1852-1942 · New York, Doubleday, Page & company · leaf 112
are out of view. The same methodis employed in art galleriesand in museums. A parabolic^reflector sends forth as parallelrays the powerful beam of a light-house, a locomotive, or a search-light. An incandescent lamp of in-genious design is silvered on itsupper half so that none of its lightis… … Lamp and reflector a unit. ■3*&fc*»&«a%S^^
Inventions · Inventors
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-433-267.webp)
