Vega's Calculations of Logarithms
In the Thesaurus Logarithmorum, Vega calculated and using the formula[more]
For and he got (note that )
In , is the factor for transforming common-to-natural logarithms. Check "show original" to compare the original source with this reconstruction.
 G. Vega, Thesaurus Logarithmorum, Leipzig, Germany: in libraria Wiedmannia, 1794 pp. v–vi.