Calculatrices et Ordinateurs dantan
Ordinateurs et Calculatrices dantan
Timeline of Logarithms
by Anthony Fogleman
John Napier was born in Edinburgh Scotland.
Jobst Bürgi was born in Switzerland.
Bürgi began working on his logarithms independent of Napier (I
was unable to find the base to which Bürgi created his
John Napier started work on his tables and spent the next twenty
years completing. The tables were for trigonometric applications
and gave the logarithms for the sine of angles 30o to 90o.
Although Napier did not actually use in his logarithms it could be
said his base was roughly 1/e.
Napier published Mirifici logarithmorum canonis descriptio in
which he discusses his logarithms.
Henry Briggs wrote a letter roughly translating questions Napiers
use of his base (1/e) and why he did not use base 10 and log 1
= 0. Napier replied that he too had the idea but could not create
the tables due to an illness.
Henry Briggs visited John Napier and they spent a month
working on the
tables for the logarithms to base 10.
Henry Briggs visited John Napier a second time.
John Napier passed away.
Briggs published his Logarithmorum Chilias Prima which
contained his tables for logarithms to base 10.
Mirifici logarithmorum canonis constructio is published in which
Napier used for constructing his logarithms is discussed.
Bürgis were published in his Arithmetische und Geometrische
Bürgis work went unnoticed due to the beginning of the Thirty
William Oughtred invented the slide rule, which offered an even