BEGIN WITH THE METHOD
Follow a worked example
A small, explicitly fictional set of longitudes makes the arithmetic and the night reversal easier to follow.
Go deeper: the full reference
Start with longitudes
Use ASC 100°, Sun 40° and Moon 130°. These are invented teaching values, not a chart calculated for a real birth. In a day chart Fortune is 100 + 130 − 40 = 190°, or 10° Libra. Spirit is 100 + 40 − 130 = 10°, or 10° Aries.
Keep the whole circle
A result of −10° wraps to 350°; 370° wraps to 10°. Use the full longitudes rather than adding only the degree within each sign. Zodiac signs occupy 30° each: Aries begins at 0°, Taurus at 30°, and so on.
Change the sect consistently
With the same teaching positions treated as nocturnal, Fortune becomes 10° and Spirit 190°. That swap changes later lots that depend on them. A real chart requires a sufficiently reliable birth time and location to determine its Ascendant and the Sun’s horizon condition.
Keep the formula beside the interpretation
This is an educational guide to the Paulus seven-lot convention. The website does not calculate personal Arabic Parts. Follow the worked example or explore the Sun, Moon and Ascendant in a regular birth chart while keeping those tools distinct.
Sources and conventions
These references identify the calendar or historical method used in this guide. Keep the named convention in view when comparing other traditions.
Greenbaum & Jones — P.Berl. 9825 (ISAW Papers 12, 2017) ↗ · Primary documentary horoscope and historical commentary, especially “Lots,” pages 34–35; identifies Paulus, Introduction chapter 23 (Boer 1958, pages 47–50), and distinguishes the Valens/Firmicus alternatives. This guide names the Paulus seven-lot convention throughout.
Connect the ideas
What are Arabic Parts?
A lot projects the relationship between chart positions from an anchor such as the Ascendant. It is a calculated point, rather than another planet.
1 min readDay, night and the direction of a formula
Sect is the day-or-night condition of the chart. In the Paulus convention used here, the seven lot formulas reverse between day and night.
1 min read