Books & Manuscripts
VLACQ (Adriann) & BRIGGS (Henry)
TRIGONOMETRIA Artificialis. Sive Magnus canon triangulorum logarithmicus, ad radium 10000000,00000, & ad dena Scrupula Secunda, ab Adriano Vlacco Goudano Constructus. Cui Accedunt Henrici Briggi Geometriæ Professoris […] Logarithmorum Viginti pro numeris naturali serie crescentibus ab Vnitate ad 20000. Quorum ope Triangula Plana & Sphærica, inter alia Nova eximiaque compendia è Geometricis fundamentis petita, folâ Additione, Subtractione, & Bipartitione, exquisitissimè dimetiuntur. Goudæ: Excudebat Petrus Rammasenius, 1633.
+4, A-F4, G2, a4, b-z6, A-L6, M2; , 52,  pp.: il.; 350 mm. Full calf; spine with loss of leather on top and bottom; red edges; stained.
Dutch editor Adriann Vlacq (1600-1667) published his tables containing logarithms of the six trigonometric functions to 10 decimal places for every 10 seconds of the quadrant and are a continuation of another work entitled Arithmetica logarithmica which contained the same functions for the same decimal places, but for every minute. The work is preceded by a theoretical part that is based on the work of Henry Briggs (1561-1630), an important British mathematician who dedicated himself to logarithms since their discovery by John Napier and with whom he worked and worked on the construction of tables. Rare.
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