Rare Books

Trigonometria Britanica: or, The doctrine of triangles, : in two books. The first of which sheweth the construction of the naturall, and artificiall sines, tangents and secants, and table of logarithms: with their use in the ordinary questions of arithmetick, extraction of roots, in finding the increase and rebate of money and annuities, at any rate or time propounded. The other, the use or application of the canon of artificiall sines, tangents and logarithms, in the most easie and compendious wayes of resolution of all triangles, whether plain or spherical. The one composed, the other translated from the Latine copie written by Henry Gellibrand, sometime professor of astronomy in Gresham-Colledge London. A table of logarithms to 100,00, thereto annexed, with the artificial sines and tangents, to the hundred part of every degree; and the three first degrees to a thousand parts