FUEL WOOD 



343 



of resin is about twice that of wood. Betts and Bateman have com- 

 piled the following table, giving approximation of the fuel value of long- 

 leaf pine of varying resin content compared to that of hickory. The fuel 

 value of resin is taken as 9400 calories per kilogram. 



APPROXIMATE RELATIVE FUEL VALUE OF LONGLEAF PINE CONTAINING 

 DIFFERENT AMOUNTS OF RESIN AND HICKORY 



Other woods to which this table could be applied are the other pines 

 such as shortleaf, loblolly, western yellow, piiion, pitch, lodgepole and 

 jack pines and a few others such as the cedars, juniper, cj^ress, etc. 



It has been determined that i lb. of good coal is equivalent to about 

 2 lb. of seasoned wood in heating values. Assuming that there are 80 

 to 90 cu. ft. of solid wood to the average cord, the weight of a cord of 

 medium, heavy and light woods would be approximately 4000, 3000, 

 and 2000 lb. respectively for seasoned sticks containing 15 to 20 per cent 

 moisture. The following table shows the number of cords of different 

 kinds of seasoned wood necessary to give approximately the same heating 

 value of I ton of coal: 



I coid 



li cords 



3 cords 



Equivalent to i ton coal 



Equivalent to i ton coal 



Equivalent to i ton coal 



