《Tetrabiblos》The Time And Period Of The EventClaudius Ptolemy（Ashmand 英譯 1822）
[86] Equatorial hours are the twenty-four hours of the earth’s revolution on its axis. Each of them is equal in duration to the passage of 15 degrees of the Equator; and they are numbered from noon to noon.
段落 tetra-2-thetimeand-8public-domain (Ashmand 1822)
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