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Multiplicatio Effectus Syderum Se∣creta.
HE that will know Great and Noble things, must commit three Rules to Memory. 1. The Rarity and Time of the Planetary Conjunctions, and multiply one into the other, if it be exquisite or perfect; if not, into the part thereof in respect of Days, and the Factus shall be the number of the Days of that Effect.
For Example; Suppose a Conjunction of Saturn and Jupiter in some point of the Zodiack, and be∣sid••s that of the Moon, ad unguem. The Conjunction of Saturn and Jupiter is in Twenty Years, and the Recourse of the Moon in Twenty seven Days, and eight Hours. Then Multiply Twenty seven, and one third part of a Day by Twenty, and they make Five hundred forty six Years, and two thirds of a Year, for the time of the Effect of that Conjunction.
But yet it may ere that be obstructed by another Conjunction, especially after one half of the time be expired; for the Effect will be Naturally increased for the space of Two hundred seventy three Years, and one third part of a Year: And this when the Conjunction of all the Three shall be in one Point.
But admit the Moon should then be distant Thirty Minutes, we will take the Semi-diameters of the Moon, and therewith compare the Proportion of her distance, in such sort, as that we allow thereunto one half of the time, because her Semi-diameter is one half of her distance. And so if the Moon shall be di∣stant one whole degree, we must give only a Fourth