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 912
ical DIALLING . 7 ' ; He Hour - distances , as you find them in the Table , both ways from G • , through Which points , draw Lines from C , and so is your Dial finiihed , as in Fig . XVIII . II . T ' he Second Variety , Of a North Plain ^ declining Westward 6o deg . and reclining from the Zenith 16… … Briton . A O . ^ The Height of the Pole or Stile above the Plain P R . T The Deflexion , or Distance of the Substile from the Meridian R O . 4 The Plain ’ s Difference of Longitude O P R . \ " H which may be found as followeth I . By Trigonometrical Calculation . thp ' P ° r A O : In the right…
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