PROP. 4.
Having the complements of the la∣titude and declination, or Suns di∣stance from the Pole, and the Sun altitude given, to finde the hour from East or West, or else from noon.
1. First of the complement of the latitude, and Suns distance from the Pole, finde the difference.
2. Count this from the sine of 9• toward the center.
3. Take the distance from thence to the sine of the Suns altitude.
4. Make that distance a parallel sine of the complement of the latitude.
5. Take out the parallel sine of 90 degrees, and
6. Make that a parallel sine in the codeclination, then
7. Take out the parallel sine o• 90 again, and
Page 123 8. Measure it from the sine of 90 toward the center, and it shall shew the versed sine of the hour from the North, or the sine of the hour from East or West; or if you reckon from 90, the hour from noon required.
Example.
Latitude 51. 32, Declination North 20. 14, Altitude 50. 55, you shall finde the hour from the North to be 10 houres, or 10 a clock in the forenoon, or 4 hours past 6, or two short of noon, according to each pro∣per reckoning.
