Maudslay marine engine, International Exhibition, London, 1862.

Plate from the 'Illustrated London News'. The English engineer, Henry Maudslay (1771-1831) was responsible for several innovative tools including accurate lathes, which were used to develop marine technology. A patent granted in 1807 for improvement in steam engines, specified, among other things, the now common pyramidal type of marine engine, with direct connections from piston to crank. His firm Maudslay, Sons and Field, begun in 1810, continued to make improvements in the field, in 1835 designing the 'side lever engine', which was used on government steam ships. A Maudslay engine is still exhibited in the Science Museum.