Ruthven's pres, and Bacon and Donkin's Pres, 1826.
© Science Museum / Science & Society Picture Library
Engraving by J Pas of two types of printing pres. In the early 19th century an Edinburgh printer named Ruthven devised a pres in which the type remained stationary, the platen moving over it on a wheeled carriage. One of Bacon and Donkin's revolving cylinder printing machines was acquired by Cambridge University Pres. Illustration from 'Encyclopaedia Londinensis, or, Universal Dictionary of Arts, Sciences, and Literature' published in London, 1810-1829.