12 inches = 1 foot. 3 feet = 1 yard. 16 1/2, feet = 5 1/2 yards = 1 rod, or pole, or perch. 660 feet = 220 yards = 40 rods= 1 furlong. 5280 feet = 1760 yards = 320 rods = 8 furlongs = 1 mile (land). 6 feet = 1 fathom. 720 feet = 120 fathoms = 1 cable's length. 6086,37 feet = 2028,79 yards = 1,1527 land miles = 1 knot or sea-mile.

SQUARE MEASURE.

 144 square inches = 1 square foot. 100 square feet = 1 square. 9 square feet = 1 square yard. 272i square feet = 30 1/2 square yards = 1 square rod. 10890 square feet = 1210 square yards = 40 square rods = l rood. 43560 square feet = 4840 square yards = 160 square rods = 4 roods = 1 acre. 27878400 square feet = 3097600 square yards =102400 square rods = 2560 roods = 640 acres = 1 square mile. 1 acre = 208,71 feet square = 69,57 yards square = 220 feet x 198 feet.

SOLID MEASURE.

 1728 cubic inches = 1 cubic foot = 2S,31Gl litres. 27 cubic feet = 1 cubic yard = 764,534 litres. 1 cubic inch = 0,0005787 cubic feet = 0,01638663 litres. 1 litre = 1 cubic decimetre = 61,0254 cubic inches. 1 perch of stonework = 24,75 cubic feet.

LIQUID MEASURE.

(U. S. standard.)

 1gill = 7,21875 cubic inches. 4 gills = 1 pint = 28,875 cubic inches. 8 gills = 2 pints = 1 quartzz57,75 cubic inches. 32 gills = 8 pints = 4 quarts = 1 gallon = 231 cubic inches = 0,133G8 cubic feet. 1 cubic foot= 7,48052 gallons (approximately 7 1/2 gallons). 1 gallon of water weighs = 8,33888 pounds. 63 gallons = 1 hogshead. 1 gallon = 1,405 litres.

AVOIRDUPOIS (COMMERCIAL) WEIGHT.

 16 drams = 1 ounce (oz.). 16 ounces = 1 pound (lb.). 14 pounds = 1 stone. 28 pounds = 1 quarter. 112 pounds = 1 hundredweight (cwts.). 2240 pounds = 20 cwts. = l ton (gross or long). 2010 pounds = 1 short ton (used in this work). 27,34375 troy grains = 1 dram avoirdupois. 1 troy pound = 0,822857 avoirdupois pound =12 troy ounces = 210 troy pennyweights = 5760 troy grains. 1 avoirdupois pound = 1,215278 troy pound.