416 TABLE XXV. CUBIC CONTENT OF ROUND STACKS. 



several places, and added together; divide their sum by the 

 mm; 1 2r of girths taken, and the quotient is the mean girth. 

 The mean girth and height thus found, are used with the Table, 

 as in the following example : 



Required the solid content of a circular stack, the girth at the 

 bottom being 56 feet, the girth at the eaves 63 feet, the height 

 from the ground to the eaves 12 feet, and the perpendicular 

 height from the eaves to the top of the stack 9 feet. 



First, add the two girths, 56 and 63 = 119, half of which is 

 59J feet, the mean girth; then, 12 feet added to 3 (one-third 

 of 0) = 15 feet, the mean height. 



Now, turn to the Table, and opposite 59 J feet (the girth), 

 under 15 feet (the height), stands 156 yards 14. feet, the solid 

 content of the stack . 



To make the calculation by the pen, the dimensions being 

 given in feet : Square the mean circumference or girth, mul- 

 tiply the product by the mean height, that product multiplied by 

 the decimal .07958 gives the content in cubic feet. If the dimen- 

 sions be given in inches, multiply the product of the factors in 

 inches by .000046052, and the product will be the content in 

 cubic feet, which divide by 27, to reduce to cubic yards. 



Or, the dimensions being given in feet, the square of the girth, 

 multiplied by the height, and the product multiplied by the 

 decimal .0029474 (which is the quotient of .07958 divided by 

 27), will give the solid content at once in cubic yards, 



"We shall take the foregoing example as an exercise. By the 

 first method, dimensions in feet, 



59.5^=3540. 25X 15=531 03.75X -07958=4225 .996425solid feet, 

 and 4225.996425 -f- 27 = 156 yards 13.996425, or nearly 14 feet. 



Dimensions given in inches, say girth 714= inches, and height 

 180 inches, 



714' 2 =509796X180 = 91763280X 000046052 = 4225.83257056 

 solid feet, very nearly the same as the former. 



By the second method, 

 59.5 2 X 15 = 53103.75 X .0029474 = 156.51799275 yards. 



If the fraction .5 1799275 is multiplied by 27 we get 13.98580425, 

 or nearly 14 feet, as above. 



The weight of hay per cubic yard, in stacks, varies very con- 

 siderably, from quality, size of the stack, age, <fec. In England, 

 stacks of new hay may weigh 8 or 10 stones, of 14 Ibs., per cubic 

 yard, and when they are 10 or 12 months old, the cubic yard 

 may weigh 14, 16, 18, and sometimes as much as 20 stones. In 

 Scotland, hay is frequently calculated by the Trone stone, vary- 

 ing, in different counties, from 22 to 28 Ibs. Imperial. New hay, 

 in small stacks, is supposed to weigh about 5 stones, of 22 Ibs., 

 per cubic yard ; large stacks, about 6 or 7 stones. Large stacks, 



