Furness cut-away

by tom - uploaded on March 18, 2009, 11:06 pm

FIG. 13.—A furnace. Pipes conduct hot air to the rooms. retrace lineart From GENERAL SCIENCE BY BERTHA M. CLARK, PH.D. (Gutenberg EBook 16593)

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boiler heater color cut externalsource fire furness hot old out outline trace
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