16:1
Those men showed me the other course, that of the moon, twelve great gates, crowned from west to east, by which the moon goes in and out of the customary times.
16:2
It goes in at the first gate to the western places of the sun, by the first gates with (thirty)-one (days) exactly, by the second gates with thirty-one days exactly, by the third with thirty days exactly, by the fourth with thirty days …
16:3
And it goes through the western gates in the order and number of the eastern, and accomplishes the three hundred and sixty-five and a quarter days of the solar year, while the lunar year has three hundred fifty-four, and there are wanting …
16:4
Thus, too, the great circle contains five hundred and thirty-two years.
16:5
The quarter (of a day) is omitted for three years, the fourth fulfills it exactly.
16:6
Therefore they are taken outside of heaven for three years and are not added to the number of days, because they change the time of the years to two new months towards completion, to two others towards diminution.
16:7
And when the western gates are finished, it returns and goes to the eastern to the lights, and goes thus day and night about the heavenly circles, lower than all circles, swifter than the heavenly winds, and spirits and elements and …
16:8
It has a sevenfold course in nineteen years.