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2. The celestial operations affect not all kinds of bodies, 

 but only the more sensible, as humors, air, and spirits. 18 

 Here we expect the operations of the sun s heat, which may 

 doubtless penetrate metals and other subterranean bodies, 

 and confine the other operations chiefly to the air, the 

 humors, and the spirits of things. 3. All the celestial 

 operations rather extend to masses of things than to indi 

 viduals. Though they may obliquely reach some individ 

 uals, also, which are more sensible than the rest, as a pesti 

 lent constitution of the air affects those bodies which are 

 least able to resist it. 4. All the celestial operations pro 

 duce not their effects instantaneously and in a narrow com 

 pass, but exert them in large portions of time and space. 

 Thus predictions as to the temperature of a year may hold 

 good, but not with regard to single days. 5. There is no 

 fatal necessity in the stars ; and this the more prudent as 

 trologers have constantly allowed. 6. We will add one 

 thing more, which, if amended and improved, might make 

 for astrology, viz., that we are certain the celestial bodies 

 have other influences besides heat and light, but these in 

 fluences act not otherwise than by the foregoing rules, 

 though they lie so deep in physics as to require a fuller 

 explanation. So that, upon the whole, we must register as 

 defective an astrology wrote in conformity to these princi 

 ples, under the name of Astrologia Sana. 



This just astrology should contain 1. The doctrine of 

 the commixture of rays, viz., the conjunctions, oppositions, 

 and other situations, or aspect of the planets with regard to 

 one another, their transits through the signs of the zodiac, 

 and their situation in the same signs, as the situation of 

 planets in a sign is a certain conjunction thereof with the 

 stars of that sign; and as the conjunctions, so likewise 

 should the oppositions and other aspects of the planets, 

 with regard to the celestial signs, be remarked, which has 

 not hitherto been fully done. The commixtures of the rays 



12 But if celestial bodies act upon humors, air, and spirits, and these in turn 

 affect solid bodies, it follows that they also act on solid bodies.^. 



