The Geometrical Construction of Solar and Lunar Eclipses.
J. Ferguson delin.
J. Mynde Sculp.
EXAMPLE.
| s | ° | ʹ | |
|---|---|---|---|
| Sun’s mean Dist. from the [[83]]Node at New Moon in April 1764 | 0 | 5 | 37 |
| To which add the Equation of the Node | + | 10 | |
| And it gives the Sun’s corrected Distance from the Node | 0 | 5 | 47 |
| To which cor. Dist. add the Eq. of the Sun’s mean Place | + | 1 | 56 |
| And it gives the Sun’s true Distance from the Node | 0 | 7 | 43 |
Which, being at the time of New Moon, is the Argument of Latitude; and in [Table XIV], (making proportions for the 43ʹ) shews the Moon’s Latitude to be 40ʹ 9ʺ North Ascending[[84]].
To find the Moon’s true hourly Motion from the Sun.
Seventh Element.
364. Precept. With the Moon’s Anomaly enter [Table XV], and thereby take out her true hourly Motion: then with the Sun’s Anomaly take out his true hourly Motion from the same Table: which done, subtract the Sun’s hourly Motion from the Moon’s, and the remainder will be the Moon’s true hourly Motion from the Sun; which, for the above time § [359], is 27ʹ 50ʺ.