Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 922
l^le plates beneath and around the tubes making a positive circulationof the flame, are of the original design, but longitudinal drums extend lengthwise overthe tubes with a water circulation in the lower half toward the rear and downwardby vertical pipes to the lower ends of the tubes. On these… … 870 SCRAPS.
Mechanical drawing
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