Timber Measure
To compute the volume of round timber—
When all dimensions are in feet, multiply the length by the square of one-quarter of the main girt, and the product will give the measurement in cubic feet.
When length is given in feet and girt in inches, multiply as before and divide by 144.
When all the dimensions are in inches, multiply as before and divide by 1,728.
Sawed or hewed timber is measured by the cubic foot.
To compute the volume of square timber—
When all dimensions are in feet, multiply the product of the breadth by the depth by the length, and the product will give the volume in cubic feet.
When either of the dimensions are in inches, multiply as above and divide the product by 12.
When any two of the dimensions are in inches, multiply as before and divide the product by 144.