《Tetrabiblos》The Time And Period Of The EventClaudius Ptolemy（Ashmand 英譯 1822）
For, if the ecliptical place be near the eastern horizon, the effect will begin to be manifested in the course of the first four months after the date of the eclipse; and its general height, or intensity, will take place in, or about, the first third part of the whole extent of its duration.
段落 tetra-2-thetimeand-6public-domain (Ashmand 1822)
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