LIQUID MEASURE. 4 gills = 1 pint. 2 pints = 1 quart. 4 quarts = 1 gallon. 31⅓ gallons = 1 barrel. 2 barrels = 1 hogshead. TIME MEASURE. 60 seconds = 1 minute. 60 minutes = 1 hour. 24 hours = 1 day. 7 days = 1 week. 28, 29, 30, or 31 days = 1 calendar month (30 days = 1 month in computing interest). 365 days = 1 year. 366 days = 1 leap year. CIRCULAR MEASURE. 60 seconds = 1 minute. 60 minutes = 1 degree. 30 degrees = 1 sign. 90 degrees = 1 quadrant. 4 quadrants = 12 signs, or 360 degrees = 1 circle. LONG MEASURE. 12 inches = 1 foot. 3 feet = 1 yard. 5½ yards = 1 rod. 40 rods = 1 furlong. 8 furlongs = 1 statute mile. 3 miles = 1 league. CLOTH MEASURE. 2¼ inches = 1 nail. 4 nails = 1 quarter. 4 quarters = 1 yard. MARINERS’ MEASURE. 6 feet = 1 fathom. 20 fathoms = 1 cable length. 7½ ca. lgth. = 1 mile. 5280 feet = 1 stat. mile. 6085 feet = 1 naut. mile. MISCELLANEOUS. 3 inches = 1 palm. 4 inches = 1 hand. 6 inches = 1 span. 18 inches = 1 cubit. 21.8 in. = 1 Bible cubit. 2½ feet = 1 military pace. SQUARE MEASURE. 144 sq. in. = 1 sq. ft. 9 sq. feet = 1 sq. yd. 36¼ sq. yds. = 1 sq. rod. 40 sq. rods = 1 rood. 4 roods = 1 acre. 640 acres = 1 sq. mile. NUMERICAL TABLE. 12 things = 1 dozen. 12 dozen = 1 gross. 12 gross = 1 great gross. 20 things = 1 score. 24 sheets = 1 quire. 20 quires, or 480 sheets = 1 ream. SIMPLE FRACTIONS. ⁶/₁₀ of 15 = 6 × 15 ÷ 10 = 9 ³/₁₀ of 15 = 3 × 15 ÷ 10 = 4⁵/₁₀ ³/₁₀ of 60 = 3 × 60 ÷ 10 = 18 ⁶/₁₀ of 60 = 6 × 60 ÷ 10 = 36 METRIC SYSTEM. Meter = Unit of length. Gram = Unit of weight. Liter = Unit of capacity. METRIC MEASURES OF LENGTH DECREASING. Decimeter (dm.) = one-tenth, .1, or ¹/₁₀ of a meter. Centimeter (cm.) = one-hundredth, .01, or ¹/₁₀₀ of a meter. Millimeter (mm.) = one-thousandth, .001, or ¹/₁₀₀₀ of a meter. METRIC MEASURES OF LENGTH INCREASING. Decameter (Dm.) = 10 meters. Hectometer (Hm.) = 100 meters. Kilometer (Km.) = 1000 meters.