| 摘要 |
<p>The calendar enables one to determine easily the past and future solar and lunar dates. The dominical letters are replaced by a reference Sunday and the Gregorian epacts derived from the "golden numbers", by a new moon, values which are carried on the sheets of the calendar. In the lower part of the sheets are the values for a century. The upper part gives the shifts of following centuries so as to condense the data. The tables on the sheets determine four parameters whose sun corresponds either to a Sunday or to a new moon. The positions of these on the discs enable one to determine all solar and lunar dates, past or future.</p> |
