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weights and measures.

liquid measure
 4 gills (gi.) = 1 pint pt. 2 pints = 1 quart qt. 4 quarts = 1 gallon gal. 31½ gallons = 1 barrel bbl 2 barrels, or 63 gallons = 1 hogshead hhd
1 hhd. = 2 bbl. = 63 gal. = 252 qt. = 504 pt. 2,016 gi.
The U. S. Gallon contains 231 cu. in. = .134 cu. ft., nearly, or 1 cu. ft. contains 7.481 gal. The following cylinders contain the given measures very closely:
 Diam. Height. Diam. Height. gill 1¾ in. 3 in. gallon 7 in. 6 in. pint 3½ in. 3 in. 8 gallons 14 in. 12 in. quart 3½ in. 6 in 10 gallons 14 in. 15 in.

When water is at its maximum density, 1 cu. ft. weighs 62.425 lb. and 1 gallon weighs 8.345 lbs.

For approximations, 1 cu. ft. of water is considered equal to 7½ gal., and 1 gal. as weighing 8⅓ lb.

The British imperial gallon, both liquid and dry, contains 277.274 cu. in. = .16046 cu. ft., and is equivalent to the volumne of 10 lb of pure water at 62° F. To reduce British to U. S. Gallons, multiply by 1.2. Conversely, to convert U. S. into Britsh liquid gallons, divide by 1.2: or increase the number of gallons 1/5.

miscellaneous table
 12 articles = 1 dozen 20 quires = 1 ream. 12 dozen = 1 gross 1 league = 3 miles 12 gross = 1 great gross 1 fathom = 6 feet 2 articles = 1 pair 1 hand = 4 inches 20 articles = 1 score 1 palm = 3 inches 24 sheets = 1 quire 1 span = 9 inches
1 sea mile (U. S.) = 6,080 ft. = 1 1/6 statute miles (roughly).
1 meter = 3 feet 3 3/8 inches (nearly).

useful tables
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