Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 211
selive steam direct from the boilers heat the feed water to amuch higher temperature, so that they act as purifiers byremoving a large portion of the scale-forming impuritiesbefore the water enters the boiler. Live steam heaters,however, are not to be considered as economizers of heat. MECHAXICAL… … Fig. 76 Mechanical Stokers 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 firings thereby admitting a large volume of cold airdirectly into the furnace on top of the…
