MOTIVE POWER OF HEAT. 



203 



TABLE B. 



VARIOUS ENGINES IN WHICH THE TEMPERATURE OF THE 

 BOILER is 121 C.* AND THAT OP THE CONDENSER 30 C. 



Theoretical Duty for each Unit of Heat transmitted, 371 

 foot-pounds. 



* Pressure 15 Ibs. on the square inch. 



