574 CARNOT’S THEORY OF THE MOTIVE POWER OF HEAT. 
TaBLe B. Various Engines in which the Temperature of the Boilers is 121,* and 
that of the Condenser 30°. 
Theoretical Duty for each Unit of Heat transmitted, 371 foot-pounds. 
Work produced] Work produced |Work produced/Per cent- 
for each pound | for each pound | for each unit | age of 
of coal con- of water eva- | of heat trans- |theoreti- 
sumed, porated. mitted. cal duty. 
Foot-Pounds. | Foot-Pounds. | Foot-Pounds. 
+e + 98,427| 160-3 | 43-2 
565,700 |&14 x 80,814 130°8 35 
& 
6 
iH 
14 x 23,571 38-1 10-3 
(3.) French Engines, according to contract, 
(4.) English Engines, according to contract, 
(6.) Common Engines, consuming 12 lbs. of coal 165,000 
per horse-power per hour, : 
(7.) Improved Engines with expansion cylinders, 
consuming an equivalent to 4 Ibs. best coal 495,000 |&4 x 70,710 114-4 30:7 
per horse-power per hour, 

* Pressure 15 lbs. on the square inch. 

