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 102
Cursus Mathematicus . Bodk I . So PROBLEM X . Two Ships , R and S , set sail together from the Port P ; the Ship S fails from P North to 5 , 73 Leagues ; and the Ship R fails dire Illy Weft , from P to A , 47 Leagues ; How far distant are these two Ships one from the other ? & … The Square of P S 73 is 5329 , and the Square of P R 2209 , their furam is 7535 ? the Square Root whereof is 86 ; and so far are the two Ships R and S distant . P RO B LE M XL There is a Square Piece of Ground , which contains 144 Perches ; I would have another Piece of Ground , exallly Square also…
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