Set of Napier's bones, 18th century.

Set of Napier's bones, 18th century.
Set of ivory Napier's bones 18th century, in wooden box. John Napier of Merchiston, invented both logarithms in 614 and his 'bones' in 1617, sets of rods with tables inscribed on them which allow the user to multiply by simply adding figures.
 
Currently on display in:
Mathematics
Year made :
1701-1800
Inventory number :
1965-83