342 TABLE XIV. CONTEXT OF MANURE PIHAPS, ROAD MET \L, &C. 



EXAMPLE 4. The mean breadth of a bing or heap of broken 

 metal for roads is 9 feet, the mean length 21 feet, and the mean 

 depth 3 feet 6 inches ; required the solid content in yards ? 



In this example we might take for the length 20 feet, and I 

 foot, but we shall take 10 feet and 11 feet, as they stand next 

 each other in the Table, and may be added together readily at 

 once. 



Having found 9 feet, the breadth, on the top of the page, 



Opposite 10 feet and under 3 feet 6 inches yds. feet, 

 stands . . . . 11 18 



And opposite 1 1 feet stands . . 12 22J 



Or 24J yards, the solid content 24 13J 



EXAMPLE 5. The mean breadth of a bing of broken metal is 10 

 feet 6 inches, the mean length 27 feet, and the mean depth 4 

 feet; what is its content in cubic yards? 



As the breadth 10 feet 6 inches is not found at once on the 

 top of the page, take it in two portions, say 9 feet and 1 foot 6 

 inches ; thus, find 9 feet on the top of the page, 



And opposite 13 and 1 4 = 27 feet, the length, yds- feet, 

 under 4 feet, the depth, stands . 179 



And . . . . . 18 18 



And in the Table, at 1 foot 6 inches broad, un- 

 der 4 feet, the depth, opposite 1 3 feet, stands 2 24 



And opposite 14 feet stands . . 33 



The cubic content 42 



If found more convenient for calculation, the length may be 

 taken as the breadth, and the breadth as the length. Thus, let 

 us suppose that the breadth in the last example is 27 feet, and 

 the length 10 feet 6 inches ; then, having found 27 feet on the 

 top of the page, 



yds. feet. 



Opposite 10 feet, and under 4 feet, stands '40 

 And opposite J foot or 6 inches stands 2 



42 solid yards, the content, as before. 42 



Note. Broken metal for roads weighs from 24 to 26 cwt. 

 per cubic yard, the harder weighing heavier than the softer. 

 The breaking of the metal is generally done at a certain rate 

 per cubic yard, which varies from about Is. 2d. to Is. Qd. more 

 or less, as the metal is harder or softer. Broken metal is also 

 estimated, in some districts, by the ton of 1C cubic feet. To 

 reduce a measurement found in solid yards by the Table to 

 tons of 16 feet, multiply the solid yards by 27, and divide the 

 product by 16. 



