The pantograph is an instrument that can be used to copy a drawing to the same size, to a larger size or to a smaller size. A stylus on one of the arms follows the line of the original whilst a pen or pencil on the other draws the copy. This example is a late 18th century bras pantograph by John Wilkinson (1728-1808) of Ormskirk. It has been set up here to make an upright copy, one third the size of the original.
© Science Museum / Science & Society Picture Library