and cheaper fuel. This is particularly true in the case of churches, 

 halls, summer cottages, and other buildings for which heat is required 

 only occasionally; hut is then wanted in large volume at short notice. 



Furnaces are built especially for burning wood in 3 or 4 foot lengths. 

 Short lengths, of course, can readily be burned in an ordinary coal 

 furnace or in a box stove, though this is rather wasteful of fuel. 

 Many furnace manufacturers, however, make a special wood grate 

 for use in their furnaces. One advantage in burning wood is that 

 on moderately cool days the furnace can be run at a lower ebb than 

 when coal is used, consuming only enough fuel to remove the chill. 

 When wood is used in a round pot furnace, care should be taken to 

 have each piece lie flat. 



If a stove grate is too coarse for wood, a sheet iron cover over a 

 good part of the surface will make it suitable, or a few fire bricks can 

 be used. Wood grates are sold which are made in two pieces and 

 which can be inserted through the fire door and placed on top of the 

 regular grate. 



RELATIVE HEATING VALUE OF WOOD AND COAL. 



In the matter of heating value, one standard cord of well-seasoned 

 hickory, oak, beech, birch, hard maple, ash, elm, locust, or cherry is 

 approximately equal to one ton (2,000 pounds) of anthracite coal. 

 It takes a cord and a half of soft maple and two cords of cedar, 

 poplar, or basswood, however, to give the same amount of heat. 



One cord of mixed wood well seasoned equals in heating value at 

 least one ton (2,000 pounds) of average-grade bituminous coal. 



Table 1 shows the price which the consumer can afford to pay for a 

 cord of wood as the equivalent of anthracite coal at various prices. 



Table 1. — Prices which the consumer can afford to pay for wood as a substitute for coal. 



Price of 

 coal de- 

 livered. 



Equivalent price for wood delivered in 

 stove lengths. 



Hickory, oak, beech, 



hard maple, ash, elm, 



locust, cherry. 



Soft maple, cedar, 

 poplar, basswood. 



Per ton. 



Per cord. 



Per run. 



1 

 Per cord. [ Per run. 



$5. 00 

 6.00 

 7.00 

 8.00 

 9.00 

 10.00 

 11.00 

 12.00 



15. 00 

 6.00 

 7.00 

 8.00 

 9.00 

 10.00 

 11.00 

 12.00 



$1.66 

 2.00 

 2.33 

 2.66 

 3.00 

 3.33 

 3.66 

 4.00 



%2. 50 SO. S3 

 3. 00 1. 00 



3. 50 1. 16 

 4. 00 j 1. 33 



4. 50 1. 50 



5. 00 1. 66 



5. 50 1. 83 



6. 00 2. 00 



