MATHEMATICAL PAPERS 



31 



EXAMPLE 2. 



yZ 



t 



s. a^B. 8 

 338 



N. 36W. 7 



7-35 

 1.77 



No. II. 



I 



\ 



i 



A method offnding the area of a Field by eajl and wej areas^ 



AiTume i o, or 1 00, or 1 000 according to tlie dimenfions of 



the field for the mean calculatral diflance of the firfl fide. 

 Add the perpendicular of the firft fide, if a northing to its 

 mean calculatral diflance ; and the fiun is its ultimate calcu- 

 latral diflance. But if the perpendicular is a fouthing, fubtra€l: 

 in {lead of adding. The perpendicular of each of the remaining 



-^. 



fides 



