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Scientific American, Vol. 29, No. 6 (1873) (1873)
leaf 7
. No drafts are produced, and the air changes con- working on the same pin. The pin in the upset carrier, F, stantly, the effect being not ai all disagreeable to the pass- passes through the curved slots, and as it acts back and forth engers. Smoke and gases and fine dust also disappear rap- moves… … street, Louisville, Ky. desired ornamental form, © 1873 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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