The logarithms are strictly Napierian, and the arrangement is identical with that in the canon of 1614.
The symbol e for the base of the Napierian logarithms was introduced by Euler .
This is the largest Napierian canon that has ever been published.
There are two bases of logarithms in common use, the base 10 and the Napierian base e.
Similarly the continued fraction given by Euler as equivalent to (e - 1) (e being the base of Napierian logarithms), viz.
