Evaluation of the Season-Granting System

Part of the Sources and Studies in the History of Mathematics and Physical Sciences book series (SHMP)

[The evaluation consists of eleven sections in two chapters (7 and 8 in this translation). Here is a list of the topics covered, with indications in modern terminology of what each section assesses:

Chapter 7
  1. 1.

    Determination of ch’i from observation: solstices

  2. 2.

    Year surplus and annual difference: tropical and sidereal year and their relation

  3. 3.

    Angular extensions of the lunar lodges: system for recording the equivalent of right ascension

  4. 4.

    Tread of the sun: mean solar motion

  5. 5.

    Expansion and contraction of the solar motion: apparent motion of the sun

  6. 6.

    Slackening and hastening of the lunar motion: apparent motion of the moon

  7. 7.

    Crossing cycle of the White Way: nodical month

Chapter 8
  1. 8.

    Day and night marks: length of day and night

  2. 9.

    Eclipses: accuracy of eclipse predictions at times distant from the epoch

  3. 10.

    Corrected conjunctions: apparent conjunctions

  4. 11.

    Disuse of Accumulated Years and Day Divisor: adoption of an epoch close to the date of promulgation]



Annual Difference Summer Solstice Winter Solstice Great Period Daily Difference 
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© Springer Science+Business Media LLC 2009

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