Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 185
pressly for this lamp, must be insert-ed every time the lamp is used. A paper or glass shade surrounds the whole of the upper part of thelamp, according as the light is required to be thrown downwards or uniformly diffused through theapartment. Dr. Ure has reported the illuminating power of this… … 3
Mechanical engineering
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-electricengineer04inte-417-185.webp)
