The civil year consisted in general of twelve months or lunations, but occasionally a thirteenth was added in order to preserve its correspondence with the solar year. [Please select]
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The gear of 48 therefore makes 19 (annual) rotations while that of 19-59 shows 118 double lunations of 29+30=59 days. [Please select]
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Formerly they regulated this discrepancy according to the mean movements of the sun and moon; but, ever since the Jesuits first instructed them more accurately, they have regulated the two years, that is, the solar year and the twelve lunations, according to the true movements, and with reference to the meridian of Peking. [Please select]
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