Napier's Bones — An ivory set from around 1650 - device for calculating products & quotients Photo Credit: By Kim Traynor - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=18564232
Napier's Bones
An ivory set from around 1650 - device for calculating products & quotients
Bust of Napier, holding his 'bones' — At the Craighouse Campus of Napier University, Edinburgh Photo Credit: By Kim Traynor - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=15880932