"Napier, in 1614, ...employed the idea of the fluxion of a quantity to picture by means of lines the relation between …"

"It is no exaggeration to say that the invention of logarithms "by shortening the labours doubled the life of the astr…"

"The method by which the logarithms were calculated was explained in the Constructio, a posthumous work issued in 1619…"

"These properties of the indices of numbers were taken notice of by Stifelius, and even by Archimedes in his work on t…"

"Many computing devices have been used since the invention of the abacus. These include , sector compasses, slide rule…"

"Let our judgment not be too harsh. The period under consideration is too near the Middle Ages to admit of complete em…"

"From every line of his descent talent seems to have flowed in upon John Napier."

"The invention of logarithms, without which many of the numerical calculations which have constantly to be made would …"

"The rapid recognition throughout Europe of the advantages of using logarithms in practical calculations was mainly du…"

"Early in the 1660s, a pair of mathematicians from the British Isles, John Napier and Henry Briggs, jointly introduced…"