## Surveyor's Square Measure

 625 square links (sq. li.) ..........= 1 square rod ...............sq.rd 16 square rods......................... = 1 square chain ......sq. ch. 10 square chains....................... = 1 acre.............................A. 640 acres................................... = 1 square mile.........sq. mi. 36 square miles (6 mi. square) = 1 township...................Tp. 1 sq. mi. = 640 A. = 6,400 sq. ch. = 102,400 sq. rd. = 64,000,000 sq. li.

The acre contains 4,840 sq. yd., or 43,560 sq. ft., and m form of a square is 208.71 ft. on a side.

## Cubic Measure

 1,728 cubic inches (cu. in.)...... = 1 cubic foot ...............cu. ft 27 cubic feet ......................... = 1 cubic yard.............cu.yd. 128 cubic feet..........................= 1 cord ......................cd 24 3/4 cubic feet.......................... = 1 perch .........................P. . 1 cu. yd. = 27 cu. ft. = 46,656 cu. in.

## Measure Of Angles Or Arcs

 60 seconds (")..........................= 1 minute .........................' 60 minutes .............................= 1 degree .........................° 90 degrees................................= 1 rt. angle or quadrant □ 360 degrees............................... = 1 circle.........................cir. 1 cir. = 360° = 21,600' = 1,296,000"

## Avoirdupois Weight

 437.5 grains (gr.).......................= 1 ounce.........................oz. 16 ounces .............................= 1 pound.........................lb. 100 pounds.............................= 1 hundredweight ......cwt. 20 Cwt.,or 2,0001b.................. = 1 ton................................T. IT. = 20 cwt. = 2,0001b. = 32,000oz. == 14,000,000gr. The avoirdupois pound contains 7,000 grains.