It is as follows:— When it has been ascertained what degree of the zodiac is on the mid-heaven, as also which are the preceding and succeeding degrees, the period of whose meeting is to be calculated, the position of the preceding degree, and its distance in temporal hours from the meridian, are next to be noted; because any part of the zodiac, on becoming distant from the meridian in the same temporal hours, must fall on the same individual semicircle.[164] For ascertaining this distance, the number of ascensions, in a right sphere, found in the intermediate space between the said preceding degree and the mid-heaven, either above or under the earth, is to be divided by the number of the diurnal or nocturnal horary times of the said preceding degree: for instance, if that degree be above the earth, by its diurnal horary times; and, by its nocturnal, if it be under the earth.
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