. American engineer and railroad journal . able II. From aninspection of these curves, it is seen that the tests with theSchmidt superheater, that is, the one giving the highest degreeof superheat, gave the lowest water consumption. The curves showing the relation between the B. T. U. perI. per minute for the different conditions of tests aregiven in Fig. J. The relation in coal consumption per I. per hour forthe four different superheaters and for the saturated steam isshown grapliically in Fig. 3, the numerical values being given inTable III. Here again the Sclimidt supeiheater r
. American engineer and railroad journal . able II. From aninspection of these curves, it is seen that the tests with theSchmidt superheater, that is, the one giving the highest degreeof superheat, gave the lowest water consumption. The curves showing the relation between the B. T. U. perI. per minute for the different conditions of tests aregiven in Fig. J. The relation in coal consumption per I. per hour forthe four different superheaters and for the saturated steam isshown grapliically in Fig. 3, the numerical values being given inTable III. Here again the Sclimidt supeiheater results are thesmallest, going as low as pounds per incicated horse-powerper hour The conumption of water per indii;ated horse-power asaffected by the degree of superheat, is well shown in Fig. 4, inwhich the pounds of steam per indicated horse-power per hourare plotted against the degrees of superheat. The pounds ofsteam per indicated horse-power per hour were obtained fromthe curves sliown in Fig. i. It will be seen that the compari-. sons are made at 160, 180 and 200 pounds steam pressure, thesebeing the pressures that fall in the center of the field of ex-periment, and for that reason would be more likely to representcorrect results. As indicated last year, it would seem that this relation couldbe approximately represented by a straight line as shown. Itis also seen that the water consumption for all pressures be-tween 160 and 200 pounds tor the Schmidt superheater is prac-tically the same. Coal Consumpiion.—The pounds of coal per indicated horse-power per hour plotted against degrees of superheat are shownin Fig. 5. The pounds of coal per indicated horse-power perhour were obtained from the curves of Fig. 3, and the degreeof superheat was obtained in the same manner as for Fig. 4. The same pressures of 160, iPo and 200 were used in thiscomparison as in the comparison for steam consumption. This
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