《Numbers: Their Occult Power and Mystic Virtue》數字的神秘象徵 (Occult Power of Numbers)William Wynn Westcott (1890)
In Numeration note that the Romans began with lines I, II, III, IIII, and then followed the Acute Angle V for 5, then for ten this was doubled X, for fift}- the angle was laid do-vn and became L, for a hundred, two fifties, one invs.-ted became C, for nve hundred C and L became D D.
段落 westcott-14public-domain (1890)
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