Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 183
expressly for this lamp, must be insert-ed every time the lamp is used. A paper or glass shade smTounds 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 thb…
Mechanical engineering · Mechanics · Engineering
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