This excerpt is taken from Houghtaling's Handbook of Useful Information ©1889
This rule will apply to a crib of any size or kind. Two cubic feet of good sound, dry corn in the ear will make a bushel of shelled corn. To get, then, the quantity of shelled corn in a crib of corn in the ear measure the length, breadth and height of the crib, inside of the rail; multiply by the length, by the breadth and the product by the height; then divide te product by two, and you have the number of bushels of shelled corn in the crib.
To find the number of bushels of apples, potatoes, etc., in a bin, multiply the length, breadth and thickness together, and this product by 8, and point off one figure in the product for decimals.
To find the amount of Hay in a Mow, allow 512 cubic feet for a ton, and it will come out very generally correct.