MEASURING LAND. 



13 



across the field from one longest corner to the other, 

 which will throw it into two triangles ; then measure 

 the nearest or perpendicular distance from each of the 

 other corners, to the line measured across the longest 

 part of the field, and find the content of the two triangles 

 as before: or, add the two perpendicular distances to 

 gether, and take half the 

 sum, which may be con 

 sidered a mean width, 

 and the line measured 

 across the field being(j 

 the length thus : 



If the distance A B be 

 298 yards, the perpen 

 dicular distance C E 117 

 yards, and the perpen 

 dicular D P 113 yards, 

 then 117 and 113 added 

 together make 230, the 

 half of which is 1 15 yards 

 for a mean width ; then 



298 yards long and 



A. R. P. 

 100 yards wide, is 6 25 



10 ....do 2 19 



5 ....do 1 9 



Content, 7 13 



A field of any number of sides may be divided into 

 triangles by measuring lines across it ; and its content 

 may then be found by the foregoing rules. 



