Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 212
kers 199 made for the regulation of the supply of fuel according tothe demand upon the boiler for steam; also that the in-termittent opening and closing of the furnace doors, as inhand firing, thereby admitting a large volume of cold airdirectly into the furnace on top of the fire, is avoided.…
