Inclined plane and wedge break for railway carriage, 1842-1846.

Chromolithograph after his own drawing by Henry Champman, of apparatus for showing presure perpendicular to a plane; and the parts of a wedge break for a railway carriage. Illustration from 'Diagrams of mechanics / under the supervision of the Society for the Diffusion of Useful Knowledge' published in London, 1842-1846.