000-100-002-619-C
Numbering rods, associated with John Napier of Merchiston
© National Museums Scotland
000-100-102-353-C
Numbering rods, associated with John Napier of Merchiston
© National Museums Scotland
000-180-000-740-C
Napier's bones
© National Museums Scotland
000-100-102-717-C
Arithmetical compendium
probably made in London
© National Museums Scotland
000-190-001-049-C
Box, for arithmetical compendium
probably made in London
© National Museums Scotland
000-180-000-735-C
Calculating device, known as Napiers box
© National Museums Scotland