Inside Out Library · Explore
Scientific American, Vol. 30, No. 7 (1874) (1874)
leaf 7
apted for floor registers, and in cases where several flues pass up the wall side by side, a pulley. The motion of this sliding frame is at a fixed speed, BARXER’S HEATING AND VENTILATING APPARATUS, metal partition is used to separate each at the poin* of loca- whether for wide or narrow timber, a… … © 1874 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
More pictures from Scientific American, Vol. 30, No. 7 (1874)
More like this
