The description and use of a joynt-rule fitted with lines for the finding the hour of the day and azimuth of the sun, to any particular latitude, or, to apply the same generally to any latitude : together with all the uses of Gunters quadrant applyed thereunto ...
Brown, John, philomath.
Page 27
Stars right Ascension being set on
the Rule—4—16
Suns right Asc. Nov. 1.—15—08—
Substraction being made, by adding
24, remain—13—08
To which you must adde the stars hour
found—7—54
Then the remainder, taking away 12
hours, is—9—02
the true hour.
