Mirifici logarithmorum canonis descriptio, ejusque usus, in utraque trigonometria; ut etiam in omni logistica mathematica, amplissimi, facillimi, & expeditissimi explicatio
Ex officinâ A. Hart, Edinbvrgi, 1614
106. Napier, a Scottish mathematician, developed a system of logarithms in this important work. Logarithms proved useful for people doing a great deal of calculations as it reduced multiplication and division down to the simpler effort of addition and subtraction.