A history of the growth of the steam-engine . , in1868, proposed a similar plan. 490 THE PHILOSOPHY OF THE STEAM-ENGINE. quate idea of the true efficiency of the perfect know almost nothing of the physical properties of steamwhich are mostly concerned in its utilization in heat-enginesat the high pressures which we know are attainable ; and itis impossible to say that the modifications of specific heatand of pressures at such high temperatures may not be suchthat it may prove a vastly more efficient workiag substancefor the heat-engine, at such temperatures and pressures,than w
A history of the growth of the steam-engine . , in1868, proposed a similar plan. 490 THE PHILOSOPHY OF THE STEAM-ENGINE. quate idea of the true efficiency of the perfect know almost nothing of the physical properties of steamwhich are mostly concerned in its utilization in heat-enginesat the high pressures which we know are attainable ; and itis impossible to say that the modifications of specific heatand of pressures at such high temperatures may not be suchthat it may prove a vastly more efficient workiag substancefor the heat-engine, at such temperatures and pressures,than we are led to consider it from our knowledge of itsproperties at the now usual working pressures. Vide a paper On a New Type of Steam-Bngine, etc., by the author,Journal of the Franklin Institute, October-December, 1811, and in the Transactions of the American Association for the Advancement of Sci-ence, 1811, in which this proposed type of engine is treated of at greaterlength, and in which this portion of these lectures was first PRIMERS In Science, History, and Literature. 18mo. Flexible cloth, 46 cents each. I.—Edited by Profs. HUXLET, ROSCOE, and BALFOUR STEWART. SCIENCE Chemistry H. E. Roscox. Physics Baltour Stewabt. Physical Geography A. Qeisie. Geology. A. Gbikik. Physiology. M. Foster. Astronomy J. N. Loceteb. PRIMERS. Botany J. D. Hookee. Logic W. 8. Jevons. Inventional Geometry W. Q. SPENCEB. Pianoforte Feakklin Tatlob. Political Economy W. S. Jevonb. II.—Edited by J. R. GREEN, ,Examiner in the School qf Modern Mstory at 0(tfora. HISTORY PRIMERS. Greece c. A. FrprE. Borne M. Cbxightoh. Europe E. A. Fbbeuan. History of Enrope Old Greek Life J. P. Mahafft. Roman S. Wilkinb. Geography Geobge Gbote. E. A. Fbeeman. III.—Edited by J. R. GREEN, PRIMERS. studies in Bryant J. Alden. Greek Literature R. C. Jebb. English Grammar Exercises R. MOBBIS. Homer W. E. Gladbionb. English Grammar R. Mobbis. English Literature Stopfobd
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