Page:The Clipper Ship Era.djvu/459

Rh to find the tonnage, three fifths of the breadth were deducted from the length and the remainder multiplied by the breadth, and this product multiplied by one half the breadth, or the assumed depth, the last product was then divided by 95, giving the formula:

Thus in a vessel measuring 100 ft. x 20 ft. x 18 ft.:

This mode of measurement continued from colonial times until the Moorsom system was adopted in 1865.

The dimensions of ten representative American and British clippers were as follows: