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Scientific American, Vol. 43, No. 16 (October 1880) (1880)

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An illustration from Scientific American, Vol. 43, No. 16 (October 1880), 1880, leaf 0
r it leaves the boilers, as well as the loss in the according to Ihe amount of air space it is intended to leave generally of a clear or grayish-white, and is mined to some boiler itself from the diminution of heat by radiation, indi- around the pipe, and the covering is plastered on this frame,… … MANUFACTURE OF NON-CONDUCTING COVERINGS FOR STEAM-PIPES AND BOILERS.-THE CHALMERS-SPENCE CO., NEW YORK CITY. © 1880 SCIENTIFIC AMERICAN, INC

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