Example.—How much powder will the cylinder contain, whose diameter is 10 inches, and length 20 inches?
10 × 10 × 20 38·2 = 52⅓ pounds, nearly.
To find the size of a shell, to contain a given weight of powder.
Multiply the pounds of powder by 57·3, and the cube root of the product will be the diameter in inches.
Example.—Required the diameter of a shell to contain 6 lb. of powder?
6 × 57·3 = 343·8, the cube root of which is 7, the diameter required, in inches.
To find what length of a cylinder (or bore of a gun) will be filled by a given weight of powder.
Multiply the weight in pounds by 38·2, and divide the product by the square of the diameter in inches, for the length.
Example.—What length of a cylinder 8 inches in diameter will be filled with 20 lb. of powder?