| − | John Napier (1550-1617) was a Scottish mathematician and devout Christian who invented the logarithm in order to express and manipulate large numbers. | + | John Napier (1550-1617) was a Scottish mathematician and devout Christian who invented the [[logarithm]] in order to simplify calculations, and express and manipulate large numbers. He also invented an early antecedent of the slide rule known as "Napier's bones." |