Vol I 





HEATED AIR ENGINE 





^300- 



...., 



Expansion, Curyt, of Steam . 



being thr dynamical, expansion curve 

 i<f .nitiinitf'1 ttfum. alUm-mg for the 

 ZWB <'/ /'' 'A.i/ M omrertfd mte 

 mffjutfucal rffret 



Tkf ahitiled arm, or an) Our rrrtangle 

 dmtrn to 0u> otrvr, rtpre^enta the ponrr 

 alitained from a ctmdaiamg atyinr trith 

 perfect vacuum but wutiaul ejcptnuum 



i jit h-tt- 



Robl J.Ccok ik tU 



