122 FUEL. 



TABLE, showing the number of gallons of water which may 

 be lifted to various heights by the consumption of 112 Ibs. 

 of coal, the pumping apparatus being good, and adapted 

 to the power of the steam engine. 



Height. Gallons. 



1 foot 1,600,000 



2 ;< . 800,000 



533,333 

 400,000 

 320,000 

 266,666 

 228,571 

 200,000 



Height. Gallons. 



9 feet 177,777 



160,000 



145,454 



133,333 



123,076 



114,444 



106,666 



100,000 



NOTES. The evaporative power of 1 Ib. of bituminous 

 coal applied to a steam boiler, is from 6 to 9 Ibs. fresh water 

 in the boiler, under a pressure of 30 Ibs. to the square inch, 

 evaporated into steam. Cumberland coal being the strong- 

 est, and Scotch coal the weakest. 



The evaporative power of anthracite coal, aided by a blast, 

 is from 7J to 9 Ibs. of fresh water evaporated into steam 

 for 1 Ib. of coal. 



In practical evaporating power 2J to 2} Ibs. of wood is 

 equivalent to 1 Ib. of bituminous or anthracite coal. 



One cord of the ordinary seasoned fire- wood is equal in 

 evaporating power to 12 bushels (960 Ibs.) of Pittsburgh coal. 



One ton of Cumberland coal is equal in evaporating power 

 to 1 tons of anthracite coal, and equal to 2.12 cords of dry 

 pine wood. 



One ton of anthracite coal is equal to If cords of dry pine 

 wood. 



Each cubic foot of water evaporated in a boiler at the 



