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MARINE REVIEW. | 36 HOWDEN HOT DRAFT SYSTEM ---- As Applied to Marine Boilers by the DRY DOCK ENGINE WORKS, DETROIT, MICHIGAN. SP cn = i : wi i nd | The following 35 steamers, aggregating 48,000 horse power, have been equipped with the Howden system by the Dry Dock Engine Works, Detroit, Mich.: Virginia, Pioneer, Chicora, i Harvey H. Brown, W. P. Ketcham, Madagascar, ae Nicaragua, Argo, Schoolcraft, Rappahannock, Sacramento, Penobscot, Mohawk, Mohegan, Progress, S. R. Kirby, R. P. Ranney, A. McVittie, Marquette, Iron Age, Pleasure, Arrow, City of Buffalo, City of Alpena, City of Mackinaw, Senator, Aragon, Robert Fulton, Sir Wm. Fairbairn, Colonial. = | Ne eee wey I Appomattox, New Davidson steamer No. 77, s Continental, Kate Buttironi. The Howden system has a total installation in all parts of the world of 1,383,500 horse power. a COVERING REMOVED--VIEW COMPLETE. oe accompanying cuts represent sections of a single boiler equipped with the | HOWDEN HOT DRAFT SYSTEM. The engine and blower for supplying draft can be placed in any convenient place, preferably in the engine room. The hot air from engine room is taken in and forced through the air duct to air heater, where it is heated by passing among vertical tubes, through which the escaping gases from the boiler pass. i || The heated air is led down in ducts Hah =F - | around breeching and delivered under toa iT l -- ---- (| and over grates in sufficient quantities | | to get perfect combustion. The arrows in accompanying views illustrate the > 7 a | I i seem ll inal passage of air from blower. This is in general the principle of the HOWDEN SYSTEM. . By ct So |) ia SECTIONAL VIEW.