202 FOOD FOR PLANTS 



Square Measure. 



144 sq. inches = 1 sq. foot. 160 sq. rods = 1 acre, 

 9 sq. feet = 1 sq. yard. 43,560 sq. feet = 1 acre. 



3034 sq. yards = 1 sq. rod. 640 acres = 1 sq. mile. 

 2.47 acres == 1 hectare. 



Facts for Builders. 



One thousand shingles, laid 4 inches to the weather, 

 will cover 100 square feet of surface, and 5 pounds 

 of shingle nails will fasten them on. 



One-fifth more siding and flooring is needed than 

 the number of square feet of surface to be covered 

 because of the lap in the siding and matching. 



One thousand laths will cover 70 square yards of 

 surface, and 1 1 pounds of lath nails will nail them on. 

 Eight bushels of good lime, 16 bushels of sand, and 

 one bushel of hair, will make enough good mortar to 

 plaster 100 square yards. 



A cord of stone, 3 bushels of lime and a cubic yard 

 of sand, will lay 100 cubic feet of wall. 



Five courses of brick will lay one foot in height on 

 a chimney; 16 bricks in a course will make a flue 4 

 inches wide and 12 inches long, and 8 bricks in a 

 course will make a flue 8 inches wide and 16 inches 

 long. 



Cement 1 bushel and sand 2 bushels will cover 3^ 

 square yards 1 inch thick, 43^ square yards ^ inch 

 thick, and 6/4 square yards >2 inch thick. One 

 bushel cement and 1 of sand will cover 2'4 square 

 yards 1 inch thick, 3 square yards -ji inch thick, and 

 4>^ square yards 3/2 inch thick. 



