ClipArt ETC
"Cold air flows up through the pipe a, and is heated by stobe b, inclosed in sheet iron c. The smoke stack e warms the air about it in brick flue f and thus draws the foul air through the opening d." —Davison, 1910

Ventilating room

"Cold air flows up through the pipe a, and is heated by stobe b, inclosed in sheet iron c. The smoke…