ON THE EFFICIENCY OF FURNACES AND MECHANICAL FIRING. Having for some time past given a large share of my at tention to the subject of the efficiency of furnaces I have to bring before you a few results of my experience in this most interesting and important inquiry. Since the time in whin Wye Williams lived and labored Professor Tyndall and Dr. Frankland have shown that the energy of combustion is within wide limits independent of ing that in furnaces the temperature of the air does not affect the efficiency. One of Wye Williams' well-known experi ments was to introduce a bent plate perforated with fifty-six half-inch holes into the center of a furnace where one or two bars had been removed for its reception. ' Adequate mix ture' says Mr. Williams ' was thus instantly obtained as in the argand gas burner ; the appearance as viewed through the sight-holes at the end of the boiler be ing even brilliant and as if streams aflame instead of streams of air had issued from the numerous orifices. It is needless to add that nowhere could a cooling effect be produced troduced.' Now I cannot at present do more than state the simple fact that I have tried simi lar arrangements in many different instances and under several different conditions and that I have rarely failed to produce a cool ing effect. The arrangement by which the results have been arrived at may be thus described : A few of the ordinary fire bars are removed from the center of the flue. A pair of longitudinal bearers about six inches apart are then introduced their upper sur faces being level with the common fire bars. On these bearers are placed small arched tranverse bars each about one inch thick in contact with one another. Semicircular holes are cast in the transverse surface of these bars so that when placed together on the bearers they present the appearance of a tunnel about nine inches high pierced with numerous small holes an arrangement not differing widely from that of Wye Williams except that the t
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EFFICIENCY, FURNACES, MECHANICAL FIRING, Having, time past given, large share, my, tention, subject, efficiency, furnaces I, bring, you, results, my experience, interesting, important inquiry, time, whin Wye Williams lived, labored Professor Tyndall, Dr, Frankland, shown, energy, combustion, within wide limits independent, ing, furnaces, temperature, air, affect, efficiency, Wye Williams' well- experi ments, introduce, bent plate perforated, fifty-six half-inch holes, center, furnace, two bars, removed, reception, ' Adequate mix ture' says Mr, Williams ', thus instantly obtained, argand gas burner, appearance, viewed, sight-holes, boiler, ing even brilliant, if streams aflame, streams, air, issued, numerous orifices, needless, add, nowhere, cooling effect, produced troduced.' Now I cannot, present do, state, simple fact, I, tried simi lar arrangements, different instances, under several different conditions, I, rarely failed, produce, cool ing effect, arrangement, results, arrived, thus described, A, ordinary fire bars, removed, center, flue, pair, longitudinal bearers, six inches apart, introduced, upper sur faces, level, common fire bars, bearers, placed small arched tranverse bars, inch thick, contact, another, Semicircular holes, cast, transverse surface, bars, placed together, bearers, present, appearance, tunnel, nine inches high pierced, numerous small holes, arrangement, differing widely, Wye Williams except, t, science, scientific, sciences, mind, health, tech, sustainability, publication, lab, sciam, sa, scientist, research, american, experiment, education, discovery, technology, analysis, magazine, u.s., insights, developments, weekly, broadsheet, inventor, innovation, inventions, patented, industrial revolution, emerging, trends, monthly magazine, united states, engravings, curious works, paper, discover, Scientific Paper, Weekly Journal, Practical Information, Art, Science, Mechanics, Chemistry, Manufactures, research, education, scientist, innovation, 19th century, vintage, america, Rufus M. Porter, 1845, journal, academic, newspaper illustrations, retro style, old-fashioned, media illustrations, victorian style, news, newspaperheadline, 19th century style, illustration, journalism
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