Forest Mensuration 15 



In the sale of tannin wood it is well to sell 5 foot sticks finely split 

 rather than heavy blocks 4 feet long. 



In the sale of pulp wood, 12 foot sticks yield much higher returns than 

 4 foot sticks, if sales are made by the cord. 



PARAGRAPH XXIV. 



LOCAL PECULIARITIES WITH REFERENCE TO STACKED WOOD. 



Tannin and pulp wood industries sometimes figure at a cord containing 

 160 stacked cubic feet, equal to i% ordinary cords of 128 stacked cubic 

 feet. 



After Graves (page 65), a cord of firewood is in certain sections under- 

 stood to be 5 feet long, 4 feet high and 65/2 feet wide. 



Under "a cord foot" is understood a stack I foot by 4 feet by 4 feet 

 (% cord or 16 stacked cubic feet). 



Under "a cylindrical foot" is understood a stacked cubic foot equal 

 to 1/128 cord. The number of such feet (a misnomer for stacked cubic 

 feet) in a stick is 



144 



(/ equals length of stick in feet; d equals its diameter in inches). 



In New England, a cord of pulp wood is sometimes measured by 

 calipering the round sticks composing it, and tables are constructed to 

 facilitate calculation. Proceed as follows : 



Ascertain diameter of sticks in inches, square them singly, total the 

 results and divide by 144. Multiply the quotient by length of sticks in 

 feet and divide by 128. 



PARAGRAPH XXV. 



BARK. 



Bark is usually sold and bought by the cord. The tanneries, however, 

 instead of measuring a cord of 128 cubic feet, apply the misnomer "one 

 cord" to a weight of 2,240 Ibs. (the long or European ton). 



Twelve cords of bark fill one common (old) freight car. 



A stack of bark contains from 30% to 40% solid bark. The specific 

 gravity of fresh oak bark is 0.874; dried, it is 0.764. 



The bark of white oak has been found (at Biltmore), to comprise: 



In trees 20 years old, 55% of the wood, or 35% of the whole bole; 

 In trees 60 years old, 41% of the wood or 28% of the whole bole; 

 In trees 100 years old, 29% of the wood or 22% of the whole bole; 

 In trees 140 years old, 21% of th" wood or 17% of the whole bole. 



