124 



STACKED OR CORD MEASURE 



of the pile is taken parallel with the surface of the ground or top of 

 stack, while height is taken vertically. The true contents of a stack 

 with the dimensions shown in Fig. 22 is 87.5 per cent of a cord. The 



correct measurement is secured if 

 length and height are taken at 

 right angles whether or not the 

 length is taken horizontally or 

 along the surface. 



102. Solid Cubic Contents of 

 Stacked Wood. The stacked cord 

 is a measuie purely of convenience. 

 The purchaser is interested not in 

 the cord, but in its solid cubic 

 contents of wood. Stacked round 

 bolts can never give 128 cubic feet 

 of wood to a cord. The highest 

 possible contents would be ob- 

 tained from bolts which were per- 

 fectly cylindrical and of uniform 

 diameter. These, if stacked in 

 hexagonal formation, or alternat- 

 ing, and with one end bolt in each 

 tier split in half to fill out the tier, would give 116.07 cubic feet, or 

 90.68 per cent of 128 cubic feet, which is the relation of the area of an 

 inscribed circle to that of a hexagon. Thi^ relation hold>i true for bolts 

 of any length or diameter. 



Fig. 22. — In the example given, the ver- 

 tical height of the pile must be 4. .57 

 feet to give 128 cubic feet. The actual 

 pile measures 112 cubic feet by either 

 method. 



Fig. 2.3. — Hexagonal piling — 116.07 cubic feet per cord or 90.68 per cent sohd wood. 

 Square piling — 100.53 cubic feet per cord or 78.54 per cent solid wood. It 

 is evident that neither the diameter nor the length of sticks would in any 

 way influence the sohd cubic contents of a cord unless taken in conjunction 

 with some other factor whose effect varies with the dimensions of the piece. 



When these cylinders are piled directh^ above one another in square 

 formation, the cubic contents of a cord becomes 100.53 cubic feet, or 

 78.54 per cent of 128 cubic feet, which is the relation of the area of 

 an inscribed circle to that of square. 



103. Effect of Irregular Piling on Solid Contents. In actual prac- 

 tice, the solid contents of a cord seldom exceeds 1 00 cubic feet. Straight 



