Note 64 — Chapter XXVII · APPLICATION, SEPARATION, AND OTHER FACULTIES

Τουτ εσι επι το κεντρον της γης. The precise meaning of the word κεντρον is “centre,” rather than “angle”; but Ptolemy uses it throughout this work, in speaking of the four angles of heaven, and I conceive he uses it here to signify an angle at, or on, the earth. The following definition of an aspect, by Kepler, strengthens my opinion: “An aspect is an angle formed on the earth, by the luminous rays of two planets; efficacious in stimulating sublunary nature.”