Set of mathematical instruments, c 1701.
© Science Museum / Science & Society Picture Library
This set of mathematical instruments was made by Dominicus Lusuerg of Rome. The range of this set of instruments is unusually extensive, from ordinary dividers to a geometric quadrant. It also includes a circle of degrees with pointers in the shape of grotesque masks, a universal sundial and a set of 'Napier's Rods'. Sets such as this would have been made to order for a wealthy client and were regarded more as an adornment and status symbol than as tools for practitioners.