232 SCIENCE OF SUCCESSFUL THRESHING 



AVOIRDUPOIS WEIGHT. 



16 ounces (oz.) = 1 pound (lb.). 

 100 Ibs. = 1 hundredweight (cwt.) . 



2000 Ibs. = 1 ton. 



2240 Ibs. = 1 long ton. 



NOTE The pound and ounce In Troy "Weight, used by jewelers, 

 and in Apothecaries' Weight used by druggists, are different from 

 those given in the above table of Avoirdupois Weights. The grain, 

 however, is the same for all. The Troy and Apothecaries' ounce 

 contains 480 grains and the pound 5760 grains; whereas, the Avoir- 

 dupois ounce contains 437.5 grains, and the pound 7000 grains. 



DRY MEASURE. 



2 pints (pt.) = 1 quart (qt). 

 8 qts. =1 peck (pk.). 



4 pks. =1 bushel (bu.). 



NOTE The standard U. S?. (or Winchester) struck bushel con- 

 tains 2150.42 cubic inches. A box a foot square and a foot deep 

 contains about four-fifths (.8035) of a bushel. The dry quart con- 

 tains 67.2 cu. in. 



LIQUID MEASURE. 



2 pints (pt.) =1 quart (qt.). 



4 qts. =1 gallon (gal.). 



31 V 2 gals. 1 barrel (bbl.). 



50 gals, (approximately) = 1 oil bbl. 



NOTE The liquid quart, such as is used for milk, molasses, 

 oil, etc., contains 57.75 cubic inches and therefore is considerably 

 smaller than the dry quart used for grains, seeds, fruits, etc. It 

 would require about 37^ (more exactly 37.236-)-) liquid quart 

 measurefuls to fill a bushel instead of the 32 dry quarts. The 

 U. S. gallon contains 231 cubic inches. The Imperial gallon (used 

 in Canada) contains 277.274 cubic inches. A U. S. gallon of water 

 weighs about 8% pounds and the Imperial gallon weighs 10 

 pounds. 



LINEAL (OR LONG) MEASURE. 



12 inches (in.) =1 foot (ft.). 



3 ft. =1 yard (yd.). 



W/ 2 ft. =1 rod. 



^/2 yds. = 1 rod. 



320 rods (or 5280 ft.) = 1 mile. 



368.5 rods (or 6080.26 ft.) = 1 knot (used at sea). 



SQUARE MEASURE. 



144 square inches (sq. in.) = 1 square foot (sq. ft.). 

 9 sq. ft. =1 square yard (sq. yd.). 



30J4 sq. yds. or 272J4 sq. ft. = 1 square rod (sq. rd.). 

 160 sq. rds. = 1 acre. 



640 acres = 1 section or square mile. 



CUBIC MEASURE. 



1728 cubic inches (cu. in.) = l cubic foot (cu. ft.). 

 27 cu. ft. =1 cubic yard (cu. yd.). 



128 cu. ft. =1 cord (of wood, 4x4x8 ft.). 



