_Cubic Content.Product of three Linear Dimensions (proportional to cube of similar sides)._ Cubic foot = 1,728 cubic in. Cubic yard = 27 cubic ft. = 46,656 " Barrel = 4.8125 " = 8,316 " Bushel = 1.2438 " = 2,150 " Gallon (wine) = 231 " Ton = 2240 lbs. avoirdupois. 1 gallon of water weighs 58,328.8 grains troy = 10.126 lbs. troy. Contents of Casks.Add into one sum 39 times the square of the bung diameter, 25 times the square of the head diameter, and 26 times the product of the two diameters; then multiply the sum by the length, and the product again by 24/2 for wine gallons. 
