《Tetrabiblos》The Periodical Divisions Of TimeClaudius Ptolemy(Ashmand 英譯 1822)
The number of days indicate as many years; every two hours over, reckon a month.” (_Ibid._, p. 55.) [283] Whether general or annual.
段落 tetra-4-theperiodi-50public-domain (Ashmand 1822)
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