TO CONVEET SCOTCH ACEES INTO IMPEEIAL. 



RULE. As the square of the Imperial chain (66 feet) 

 is to the square of the Scotch chain (74f feet), so are the 

 Scotch acre or acres to the Imperial. Or, 



As 435600 is to 553536, so are the Scotch acre or acres, 

 c., to the Imperial. 



Ex. In 510 Scotch acres, how many Imperial acres ? 



S. A. 



435600 : 553536 : : 510 

 510 



553536 

 2767680 



435600)282303360(648 12 21 Imp. 

 2613600 



2094336 

 1742400 



3519360 



3484800 



34560 

 4 



435600)138240(0 

 40 



435600)5529600(12 

 435600 



1173600 

 871200 



302400 



435600)9147600(21 

 871200 



435600 

 435600 



