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The art of dialling : performed geometrically ... arthmetically ... instrumentally ... (1700)
Leybourn, William, 1626-1716 · London : T. Braddyll · leaf 99
Geometrical Dialling , Fourthly , Divide the Semicircle B D C into 1 2 equal parts at the points © O © &c. beginning the divifion at the point E. A Sooth Plain Declining Fuji 30 d. Reclining 34 cl. 32 m. … Fifthly Tnrough the point O, (or any other point ta- ken at a!! adventures in the Subftilar Line) draw a Line MON at right Angles (or perpendicular) to the Subftilar reprefenting the Asquinoftial. ' ’ _ §ixthl;y Lay a Ruler from A, and every of the points Gcf. ,nrhe Semicircle, and it will crofsthe…Dialing · Mathematical instruments · Quadrants (Astronomical instruments) · Sundials
Internet Archive · Wellcome Library · Public domain (published before 1931). Free to use for anything.
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