Photograph: David Remes (2003)
Sketches of a mechanical copying machine, or ‘bigrapher’, from 1777. The writing is done with the quill on the extreme right of a 3 ft long arm. The tube near its middle duplicates the document on a separate sheet of paper at the same time as it is written.
Today a working model of the bigrapher can be seen and tried out at Erasmus Darwin House, Lichfield. Darwin would later work on another type of copying machine.