TABLE XYIH. 



SHOWS THE CUBIC OR SOLID CONTENT OP DIGGING IN DRAINS OB 

 DITCHES, FROM 9 INCHES TO 7 FEET IN DEPTH, 6 INCHES TO 5 FEET 

 6 INCHES IN WIDTH, AND \ YARD TO 1000 YARDS IN LENGTH. 



THE depths are placed on the top of the pages, the widths on the 

 top of the columns, and the lengths in the first column on the 

 left hand ; and opposite each length, under the various widths on 

 the top of the columns, at the depth, on the top of the page, stands 

 the solid content in yards and feet. 



As drains and ditches are wider at top than bottom, the mean 

 width must be taken before finding the content by the Table ; 

 this is done by adding the widths at top and bottom, and dividing 

 the sum by 2. 



If any required dimension is not found in the Table, it may 

 be made up by adding together two dimensions ; for example, for 

 a depth of 3 ieet 4 inches, the contents for 10 inches and 2 feet 

 6 inches may be added together ; for 3 feet 8 inches, the contents 

 for 1 foot 2 inches and 2 feet 6 inches, &c. Or it may be some- 

 times more convenient to find the content for the half, or for 

 double the required dimension, such as for a depth of 2 feet 8 

 inches, take twice the content for 1 foot 4 inches, and for a width 

 of 2 feet 9 inches, take half the content for 5 feet 6 inches, &c. 

 Or, if found more suitable, the content of one dimension may be 

 subtracted from another ; thus, if a depth of 4 feet 4 inches is 

 required, the content of 1 foot 2 inches may be subtracted from 

 the content of 5 feet 6 inches, &c. Or, the width may be used 

 for the depth, and the depth, in that case, for the width ; as, for 

 example, '200 yards long, and 5 feet 6 inches deep, by 2 feet 6 

 inches wide = 305 yards 15 feet, and 200 yards long, and 5 feet 

 6 inches wide by 2 feet 6 inches deep is also 305 yards 15 feet. 

 Any required length may also be made up, by doubling, halving, 

 or adding together the contents of two or more lengths, as is 

 found most convenient. 



NOTE. In adding together two contents, or in subtracting one 

 content from another, it must be remembered that 27 solid feet 

 make one solid yard. 



In calculating the Table, fractions in the content, of \ foot and 

 under are neglected, when they exceed J foot they are reckoned 1, 



