The Astronomical Observatories of Jai Singh c6.s1.t1.13

c6.s1.t1.13

⁴ The lines that divide the houses pass through *H* and *H*₇, the points common to the horizon and meridian, and points on the Equator at intervals of 30 degrees starting from the East and West line. Their centres lie on the line that passes through *X* (the centre of the circle of the horizon) and is parallel to the East and West line. The points of intersection of these house lines with the Ecliptic are termed cusp. (For further details, see p. 120 and STOFLER, *Elucidatio fabricæ ususque astrolabii* 1524.)