BRIGGS, Henry

by Henry Briggs

£5,750 · Offered by Sokol Books

1st edn. of the first complete set of trigonometrical tables, "containing the natural sines, tangents and secants to the one hundredth part of a degree and to 15 places, which have never been superseded by any subsequent calculations". The work arose out of discussions between Briggs, professor of geometry at Gresham College, and the great Scots mathematician John Napier, the inventor of logarithms, who in 1614 had published his 'Mirifici Logarithmorum Canonis Descriptio'. Napier agreed to suggestions by Briggs for adapting his invention more readily to the construction of tables, and the result, entailing prodigious labour, was Briggs's 'Arithmetica Logarithmica' (1624) and the present work. It is clear that the scale of logarithms now in use, in which 1 is the logarithm of the ratio 10 to 1; 2 that of 100 to 1, etc., is due to Briggs, and that Napier's role consisted simply in advising him to commence at 1 and make the logarithms increase, rather than decrease, with the natural numbers. Briggs is certainly the originator of the principle of logarithms having 10 for their base. On his death in 1630 the 'Trigonometria' was still unfinished, but was completed by his friend Henry Gellibrand, professor of astronomy at the same college, who added a preface explaining the application of logarithms to plane and spherical trigonometry. They also proved highly useful in the advance of systematic geography and navigation, and among the pioneers in this field who benefited from Briggs'

• Binding: Hardcover

Found via Rare Books Intel, a search across rare-book dealers, auction houses and marketplaces worldwide.