Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 211
eaters which uselive 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… … 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 firing, thereby admitting a large volume of cold airdirectly into the furnace on top of the fire, is…
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