The art of dialling : performed geometrically ... arthmetically ... instrumentally ... (1700)
Leybourn, William, 1626-1716 · London : T. Braddyll · leaf 27
The Great Circles are^ 1 The Horizon , 2 The Meridian , 3 The Riquinottid. The LeJJ'er Circles are , 1 The Tropic 4 of Cancer , 2 The Tropic^ of Capricorn. / I. O/^e HORIZON. In the following Figure, let the outermofl Circle there¬
