The art of dialling : performed geometrically ... arthmetically ... instrumentally ... (1700)
Leybourn, William, 1626-1716 · London : T. Braddyll · leaf 77
Freometrical Dialling. The Firfi Variety . CHAP. XII. How to draw the Hour-lines upon an iEquino&ial Plain, Reclining juft to the Pole. Sllppofe a South plain fliould Recline 38 deg. 28 min.* 1 in the Latitude of London 51 deg. 32 min. Firft, Draw the Circle W P E R, reprefenting your Reclining… … Secondly Becaufe the plain Reclines 38 deg. 28 min, take 38 deg. 28 min. out of your Chord, and fet them from P to 4, and from E to k Thirdly, Lay a Ruler from W to a, it will cut the Me¬ ridian in Z, lo is Z the Zenith of the place, through which point, and the points W and E ( the Weft an d Eaft…
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