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.