Cursus mathematicus. Mathematical sciences : in nine books : comprehending arithmetick, geometry, cosmography, astronomy, navigation, trigonometry, with the description, construction, and use of geometrical and nautical instruments: and the doctrine of triangles applied to practice in mensurations of all kinds: as in longimetria, planometria, military architecture, or taking of heights, distances &c. surveying of land, woods, roads, &c. fortification. And in navigation, dialling, &c. : all which are disposed in such method and order as they ought to be read and practised, by such as would attain to a competent proficiency in them by their own industry (1690)
Leybourn, William · printed for Thomas Basset, Benjamin Tooke, Thomas Sawbridge, Awnsham and John Churchill · leaf 168
Book I * Cursus Mathematicus * 1 ^ 6 r i i ■ r o s i o I 1 ° I I I I IOO 1 ^ he Characteristick of j ioo I o o o 2 „ kT . « ; > and J * is all Numbers between . iooo j I 0 o o o | ioooo j | 4 IOOOOO ^ IOOOOO J, ; ^ ioooooo j . I 5 So that the Characteristick of any Logarithm is one Unite less than… … The Logarithms of this kind , ought all of them to consist of an equal Number of Pla ces for you may propose them to consist of either six Places,as those in the two foregoing Tables A B and CD ; or of seven , eight , ten , Or fifteen Places , ( as those in Mr . Briggs ' s, ) or as many as you…
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