CHAP. XXIV. What it is to increase or diminish in heighth.
THe Mariners call it increasing in heighth, when they go further and further from the Equinoctial; and diminish∣ing in height when they approach neerer to the Equi∣noctial. So that in our Navigation we either sail from a greater to a less altitude of the pole, and then we go towards the Equinoctial, and then the height is said to be diminished: or we sail from a less to a greater height of the pole, and then we go from the Equinoctial, and are said to increase our heighth. And hence it is, that casting our point by imagination, and af∣terwards (having taken the heigth) amending it by traversing, ei∣ther the heighth, wherein we find our selves being taken by the Sun or star is greater, or else it is less then that which we made account of by imagination. And hence do arise four rules: The first is, that when in sailing we do increase the heighth, if the point amended by traversing be of greater heighth then the point of imagination, the ship hath gone more then the point of imagination shewed us.
The second, when we increase our heighth, if the point a∣mended