The art of dialling : performed geometrically ... arthmetically ... instrumentally ... (1700)
Leybourn, William, 1626-1716 · London : T. Braddyll · leaf 192
l Dialling. And as the 7 ropicks were defcribed, fo likewife may the Parallels of the Suns Entrance into the other Signs, be inferted, if into your Trigon you put the Arches of their Declinations irom the Equinollial, namely n deg. 30 min. and zo deg. iz min. And foare the Pa¬ rallels of the Signs… … And lo are the Diurnal Arches put into the South-Plain, reprefented by the Pricked lines there, in Fig. HI, and the Trigon thereunto belonging Fig. IV. CHAP. III. .How the Hour sfrom the Sun’s Riling and Setting are to he infcriled into all forts of Dial-Plains. THe Hours from Sun-Pi fing are…
