166 SQUARE MEASURE. 



SCALE OF COMPARISON. 



A. R P. sq. yds. sq. ft. sq. in. 



1=4=160=4840 =43560 =6272640. 



1= 40=1210 =10890 =1568160. 



1= 30 J = 272J= 39204. 



1 = 9 = 1296. 



1 = 144. 



NOTE. Artificers usually estimate their work 1. In 

 glazing and stone-cutting, by the square foot. 2. In paint- 

 ing, plastering, paper-hanging, &c., by the square yard. 



3. In flooring, roofing, slating, &c., by the 100 square feet. 



4. In bricklaying, by the thousand bricks, by the square 

 yard, and 100 feet. 



The painting of mouldings, cornices, &c., is estimated by 

 measuring the entire surface. 



When bricklaying is estimated by square measure, the 

 work is understood to be 12 inches thick. 



Surveyor's square measure is used in finding the area of 

 land. 



TABLE. 



625 square links (sq. 1.) make 1 sq, rod, marked sq. rd. 



16 sq. rods " 1 sq. chain, " sq. ch. 



10 sq. chains " 1 acre, A 



640 acres " 1 sq. mile, " sq. mi. 



36 sq. miles (six miles square) " 1 township, " Tp. 



