The 18th Improvement

Consists of introducing iron pillars into the ship's hold, between the centre lines of the keelson and the beams, so as to prevent the beams from working up and downwise, as they are prone to do in a heavy seas when ships are deeply laden, and thus making the beams work at their ends, where they are fastened to the sides of the ship.

. . .

Shipwreck and Collisions at Sea greatly prevented by Christophers' Patent Improvements in Naval Archtecture. With four plates.
London: J. Olliver, 59, Pall Mall; P. Richardson, 23, Cornhill. Liverpool: Deighton & Laughton. M.DCCC.L. 8vo, (4), 112 p, 4 pl.

Transcribed by Lars Bruzelius

Sjöhistoriska Samfundet | The Maritime History Virtual Archives.