Tables of Measures and Weights. 125 



Square or Surface Measure, continued. 



sqm. a. sq. rd. sq. yd. sq.ft. sq. in. 



1 = 040 102,400 — 3,097,600 — 27,878,400 = 4,014,489,600 



1 = 160 — 4,S40 = 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 =- 3,6S6,400 = 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. 



21\\ 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 



