《Tetrabiblos》The Periodical Divisions Of TimeClaudius Ptolemy（Ashmand 英譯 1822）
These observations are necessary, because the general divisions of time must be considered by means of the spheres, as a primary arrangement; although minor distinctions are to be made by means of the existing peculiarities found in nativities.
段落 tetra-4-theperiodi-5public-domain (Ashmand 1822)
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