Mirifici logarithmorum canonis descriptio, ejusque usus, in utraque trigonometria; ut etiam in omni logistica mathematica, amplissimi, facillimi, & expeditissimi explicatio (1614)
Napier, John, 1550-1617 · Edinbvrgi, Ex officinâ A. Hart · leaf 9
Logarithms · Trigonometry · Logarithms -- Early works to 1800 · Trigonometry -- Early works to 1800
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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