《Tetrabiblos》The PlanetsClaudius Ptolemy（Ashmand 英譯 1822）
Its longitudinal division is made by the line of the Arabian Gulf, the Ægean Sea, Pontus, and the lake Mæotis; and by this line are separated its eastern and western parts.
段落 tetra-2-theplanets-7public-domain (Ashmand 1822)
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