FUEL. 



123 



pressure of the atmosphere, will heat 2,000 cubic feet of in- 

 closed air to an average temperature of 75. 



Each square foot of surface steam-pipe will warm 200 

 cubic feet of space. 



One pound of anthracite coal in a cupola furnace will 

 melt 5 to 10 Ibs. of cast iron. 



80 bushels of bituminous coal in an air furnace will melt 

 10 tons of cast iron. 



Small or fine coal produces about } the effect of large 

 coal of the same kind. 



TASLE, showing the price of parts of a cord of wood, at cer- 

 tain rates per cord. 



FEK1 

 1 



2 



3 

 4 

 5 

 6 

 7 

 8 



16 



24 



32 



40 



48 



56 



64 



72 



80 



84 



88 



92 



96 



104 



112 



120 



128 



01 



02 



03 



05 



06 



07 



08 



(.9 



19 



28 



38 



47 



56 



61 



75 



84 



94 



98 



03 



03 



13 



22 



31 



41 



50 



$1.75 $2.00 $2.25 $2.50 $2.75 $3.00 $3.25 



01 

 02 

 04 

 06 

 07 

 08 

 10 

 11 

 22 

 33 

 44 

 55 

 66 

 77 

 88 

 98 



01 

 03 

 04 

 06 

 08 

 09 

 11 

 12 

 25 

 37 

 050 

 63 

 75 



88 



1 00 

 1 13 

 1 25 

 1 31 

 1 38 

 1 44 

 1 50 

 1 63 

 1 75 



1 88 



2 CO 



02 

 03 

 05 

 17 

 09 

 11 

 12 

 14 

 28 

 42 

 56 

 70 

 84 

 98 



2 25 



02 



04 

 06 

 08 

 10 

 12 

 14 

 16 

 31 

 47 

 63 

 78 



94 



1 09 

 25 

 41 

 56 

 G4 

 72 

 80 

 88 



2 03 

 2 19 

 2 34 

 2 50 



02 



04 



06 



09 



11 



13 



15 



18 



35 



52 



69 



86 



03 



20 



38 



55 



72 



81 



89 



98 



06 



2 23 

 2 41 

 2 58 

 2 75 



02 

 05 

 07 

 09 

 12 

 14 

 16 

 19 

 37 

 56 

 75 

 94 



12 

 31 

 50 

 69 

 88 

 97 

 06 

 15 



2 25 

 2 44 

 2 62 



2 81 



3 00 



02 

 05 

 07 

 10 

 13 

 15 

 17 

 20 

 40 

 61 



81 



1 02 

 1 22 

 1 42 

 1 62 



1 83 



2 03 

 2 13 

 2 23 

 2 33 

 2 44 

 2 64 



2 84 



3 05 

 3 25 



