solid wood is about 80 cubic feet. 



It is pointed out, however, that heat value is not the only 

 test of usefulness in fuel wood and since 95 per cent of all 

 wood used for fuel is consumed for domestic purposes, largely 

 in farm houses, such factors as rapidity of burning and ease of 

 lighting are important. Each section of the country has its 

 favored woods and these are said to be, in general, the righ 

 ones to use. Hickory, of the non-resinous woods, has the high 

 est fuel value per unit volume of wood, and has other advan- 

 tages. It burns evenly, and, as housewives say, holds the 

 heat. The oaks come next, followed by beech, birch, and ma- 

 ple. Pine has a relatively low heat value per unit volume, but 

 has other advantages. It ignites readily and gives out a quick 

 hot flame, but one that soon dies down. This makes it a fa- 

 vorite with rural housekeepers as a summer wood, because it 

 is particularly adapted for hot days in the kitchen. 



The fuel qualities of chestnut adapt it particularly to work 

 in brass foundries, where it gives just the required amount of 

 heat and it is therefore in favor. Coastwise vessels in Florida 

 pay twice as much for Florida buttonwood as for any other, 

 because it burns with an even heat and with a minimum 

 amount of smoke and ash. 



The principal disadvantage of the resinous pines is their oily 

 black smoke. 



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