CHAP. IV.
The Uses follow in order.
1. To finde the Suns Declination.
LAy the Thread on the day of the moneth, then in the line of degrees you have the declination. From March the tenth toward the head is the Decli∣nation Northward, the other way is Southward, as by the time of the year is discovered.
Example:
On the tenth of April it is 11d 48' toward the North; but on the tenth of October it is 10d 30' toward the South.
2. As the thread is so laid on the day of the moneth, in the line of the Suns place, it sheweth that; and in the line of the Suns right Ascension, his right Ascension also, onely you must give it its due order of reckoning, as thus: it begins at ♈ Aries, and so proceeds to ♋, then back again to ♑ at the eleventh Page 14 of December, then forwards again to ♈ Aries, where you began.
3. To finde the Suns right Ascension in hours and minutes.
Lay the thread as before, on the day of the moneth, and in the line of right Ascension you have the hour and mi∣nute required, computing right accor∣ding to the time of the year, that is, be∣gin at the tenth of March, or ♈ Aries, and so reckon forwards and backwards as the moneths go.
Example.
On the tenth of April the Suns place is 1 degree in ♉ Taurus, and the Suns right Ascension 1 hour 55 minutes: on the tenth of October 27d 1/4 in ♎ Libra, and his right Ascension is 13 hours and 42 minutes.
4. To finde the Suns Amplitude at rising or setting.
Take the Suns Declination out of the particular Scale of Altitudes, and lay it the same way as the Declination is, Page 15 from 90 in the Azimuth Scale, and it shall shew the Amplitude from the east or west, counting from 90. Example: May the tenth it is 33. 37.
