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Les diagrammes suivants illustrent la mithode. 1 2 3 1 2 3 4 5 6 fBlIOTH ARCHIVE OTTAWA, o;,r Consume Your Smoke Save fuel, make friends with your neighbors, create healthy atmosphere in your boiler room, by applying "The Backus Perfect Combustion Furnace" to your boilers; easily applied to any boiler, requires no attention from engineer or fire- man, and guarantees to consume NINETY-FIVE PEP CENT, of all gases and smoke. I PRESENT HEREWITH a sectional view of the Baokcjs Furnace, vith tlio side hrokon away so that its modo of oporation may be the more readily observed. The great claim for the Backus Furnace is that it assures perfect combustion, which includes in its train fcconomy of fuel, elimination of the smoke nuisance, a minimum of work for the fireman, and freedoii; from soot and cinders. The commonly accepted construction of a furnace is to place a orate under the boiler, throwing thereon soft coal for fuel, and closing the door. The process of slow combustion melts the coal, which runs down and closes the apertures of the grate. This excludes the air and renders combustion imperfect, for the want of sufficient oxygen. By* the introduction of a large volume of air the black- smith with his bellows o otains perfect combustion in his forge. In a contfagration where the free presence of oxygen inten; ifies the flames, brick walls are melted. Hence by the introduction of a sufficient amount of oxygen in the ordinary furnace perfect combustion may be obtained. This is accomplished by introducing air through large ducts or flues built in the brick work at each side of the fire box in front, and by substituting grate surface in place of tha ordinary or common door-sill, and by building a brick arch between the boiler and tire, — this arch abutting against the front and over the door, and extending into the furnace sufficient distance [depending on the length of the boiler], to heat the incoming air before it mixes or comes in contact with the escaping carbon or soot, and preventing the cold air meeting the boiler. The arch becomes intensely heated and causes the cases to ignite with the carbon, giving off a clean flame or perfect combustion at the inner end of the arch. The philosojyhy of this furnace in brief is, that by the air ducts at the front a large volume of air is admitted, which, passing over the fire and under the red hot arch, unites with the carbon and creatcg a perfectly clean flame. There ean thus be no deposit of soot in the flues or escape of smoke through the chi.imey for the reason that both soot and smoke are consumed under the boi er, and thus,instea.lof a nuisance, are utilized as Hame producers. By elongating and elevating the bridge wall the Hon.e is nm(h. to hug the boiler, and a small pit at the rear end receives what cinders may escape comimstiou. , ,. ■ i i.u • \ ^ This furnace, according to testimonial.), is recognized as the Jireman s friend, as there is less coal reciuired to perforn. a given amount of work, less a,shes to remove, and no soot m tlues. The company hold a testin.onial letter fron. Jas. H. Wade, Secretary and steward ot the University of Michigan, where nine of these furnaces are in operation, also from ( . H. «uhl, J J. BaLdev & Co Metcalf Bros, and others of Detroit, Michigan, and many others in ditlerent parts ot the country; all speaking in the most um.ualihed terms of praise of the device, ".so perfect in its working that nothing appears wanting." , . ^ . ^ n Any ordinary furnace can be recon.structed with this arch and air ducts at small expense. I have purchase.1 the right to con.struct and u,se this furnace for the Dominion of ( anada and am prepared to give instructions how to construct the same, and will guarantee results, and sell the rieht to others to build and u.so the furnace for an e(|uitable consideration. They are applied to the boilers of the Rossin House, and I invite engineers, property owners members of the Council, and all others interested in having smoke con.sumed from factorus, planing mills, and other chimney stacks where steam for power or heating is use.l, to call and examine the furnace hi practical operation. • v , «i ;; +,. The cost oi applying the furnace to ordinary boilers of 10 to ..0 horse-power is from *lo to $2o '-■*'^^'|^_^''JJ^j^j^^, ^.^^ ^j^;,^^. j,^^ ^^^^^. i^ ^a,e^| up,,„ the horse-power capacity of each boiler, during the life of the Patent, as follows: From 1 to 14 hor.se-power • 15 to .34 " 35 to 49 " .50 to 74 " 75 to TOO $ 50 00 75 00 100 00 150 00 200 00 Special rates given to distillers, brewers and manufacturers, or public buildings having boilers of larger capacity, or a number of small boilers in one set. Interviews anal slack, which usually makes a dense black smoke, and on top of this was thrown a barrel aiul a half of de- cayed apples and bananas, damp straw, and sweepings. An immediate rush was then made for the outside to see the smoke, but not enough was ijerceptible to discolor the cheek of a society liellc. Col, Thompson, w ith the pros- pect in view of hjsing his job, laughingly threatened to 'lanl the engineer up and tine him if he couldn't make ii smoke. This snK.ke-coiisume"' lias been in use twd weeks, and Mr, Sl.ack was much please