Tables of Measures a?id Weights. 125 



Square or Surface Measure, continued. 



sq m. a. sq. rd. sq. yd. sq.ft. sq. in. 



1 = G4U = 102,400 = 3,097,600 — 27,878,400 = 4,014,489,600 



1 = 160 = 4,840 = 43,560 = 6,272,640 



1 = 30)4 = 272}.^ = 39,204 



1 — 9 = 1,296 



1 = 144 



Surveyors* Square Measure. 



625 square links = 1 square rod, or pole. 



16 poles ^1 square chain. 



10 square chains = 1 acre. 



640 acres ..... = 1 square mile or sec. 



36 square miles (6 miles sq.) . . . = 1 township, 

 tp. sq. mi. a. sq. ch. sq. rd. sq. 1. 



1 = 36 = 23,040 =- 230,400 =- 3,686,400 = 2,304,000,000 



Solid or Cubic Measure. 



1728 cubic inches = 1 cubic foot. 



27 cubic feet = 1 cubic yard. 



16 cubic feet =1 cord foot. 



8 cord feet, or 128 cubic feet . . . = 1 cord of wood. 



24% cubic feet — 1 perch. 



ru. yd. cu. ft. cu.in. cd. cd. ft. cu. ft. cu. in 



1 == 27 == 46,656 = 1 = 8 = 128 = 221,184. 



Avoirdupois, or Commercial Weight. 



27^1 grains =1 dram. 



16 drams = 1 ounce. 



16 ounces = 1 pound. 



25 pounds = 1 quarter. 



4 quarters, or 100 pounds . . . . = 1 hundredweight. 

 20 hundredweight, or 2,000 lbs . . = 1 ton. 



480 pounds = 1 imperial quarter. 



100 pounds is also called 1 central. 



t. cwt. lb. oz. dr. gr. 



1 = 20 = 2,000 = 32,000 — 512,000 

 1 = 100 = 1,600 = 25,600 



1 =_- 16 = 256 = 7,000 



1 = 16 -= 4,375 



