84 



DUNGHILLS. 



N.B. The depths in the preceding Table are only stated at every 

 three inches; and in order to find the measurement of a dunghill at 

 any intermediate depth, take the contents of the next less, and that of the 

 next greater in depth from the Table ; find their difference ; then, accord- 

 ing as the given depth is one or two inches greater than the next lower 

 in the Table, add one-third or two-thirds of the difference found, as above, 

 to the contents of the lower, which will give the proper contents. When 

 the given breadth exceeds the greatest breadth noted in the Table, the 

 contents may be ascertained by means of two or more breadths, such as 

 can be -found in the Table, equal to the given breadth. Thus, to find the 

 contents of a dunghill 35 feet broad, 3 feet deep, and 20 yards long- 

 First take from the Table the contents of one 20 yards long, 3 feet deep, 

 and 21 feet broad, next that of one 20 yards long, 3 feet deep, and 12 feet 

 broad, then of one 20 yards long, 3 feet deep, and 2 feet broad ; the con- 

 tents of these added together will be the answer required. 



