《Tetrabiblos》Number Of The Modes Of ProrogationClaudius Ptolemy（Ashmand 英譯 1822）
In conformity with these rules now laid down, the amount of the times must necessarily be obtained.[184] [184] The calculation of time may be greatly facilitated by the use of a zodiacal planisphere, said to have been invented about thirty years ago by Mr.
段落 tetra-3-numberofth-68public-domain (Ashmand 1822)
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