ON THE THEOllY OF TUE STEAM-ENUIJJE. 



583 



The work of developing this theory is still incomplete. It remains 

 to be determined, by experiment, precisely what are the laws of transfer 

 of beat between metal and vapour, in the engine cylinder, and to apply 

 thesclavvs in the theory of the machine. Cotterill has shown how heat 

 penetrates and traverses the metal, and Grashof has indicated the 

 existence of an intermediate and approximattly constant temperature, 

 bet^Nuen the temperatures of the initial steam and of the exhaust, and 

 both liave given us some new methods. The writci', wliile pointing out 

 the iiiitnre of the true ' curve of efficiency ' of the .steam-engine, which he 

 was so fortunate as to discover, has shown how it may bo made useful in 

 the .solution of practical and of theoretical proi)leras involved in the 

 applied theox'y of heat-engines, and many able minds are now engaged 

 upon the theory. There can be little doubt that it will soon become 

 satisfactorily complete. 



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Tredgold, Thos. ' Treatise on the Steam-Eiigiue.' London : 1827. 



Tambour, Comte F. ^I. G. do. ' Theorie des Machines a Vapeur.' 

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Albans, Dr. H. ' Treatise on the High Pressure Steam-Engine.' 

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Eenwick, Professor James. ' Treatise on tlie Sieam-Engine.' New 

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' Arti.san Club Treatise on the SteaTU-l'Jngiue.' London : 



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' Manual for Mechanical Engineers.' Loudon : 1877. 



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Bourne, John. 

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Clark, D. K. 



Chirk, D. K. 



Raiikine, W 

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llaukine, W. 

 London: 1881. 



Ishcrwood, B. F. ' Engineering Precedents.' XewYoik. 18o0. 



Lshcrwood, B. F. ' Researches in PJngineering.' Philadelphia: 1863. 



Chinsins, R. ' The Mechanical Theory of Heat with its Applications 

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Clausius, R. Translated by Walter R. Browne. London : 1879. 



Hirn, G. A, ' Thermodynamique,' Paris : 1876-7. 



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Thurston, R. H. 'History of the Steam-Engine.' (International 

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Thurston, R. H. On ' Curves of Efficienc^v.' Jour. Frank. Inst. : 

 1882. 



Thomson, Sir Wm. ' Mathematical and Physical Papei-s.' Cambridge: 

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