從集韻反切看切韻系韻書反映的中古音

On Ancient Chinese as Reflected in Ch'ieh-yün from the Fan-ch'ieh's in Chi-yün

切韻系韻書反映的中古音，有幾個一直爭論未決的大問題，如三等韻聲母是否為顎化，四等韻是否有介音，三等韻重紐究竟差別何在？在我看來，集韻反切都可以給予決定性的啟示。廣韻大致承襲陸氏切韻之書。集韻晚廣韻三十年，分韻與廣韻無殊，實際韻類亦無差異，除床、禪二母偶有相混外，聲類亦並無不同；所不同於廣韻的，只是增字增音而已。

Do palatalized initials exist in third-division rimes and do medials exist in fourth-division rimes in Ancient Chinese? What actually are the differences between the fan-ch'ieh doublets in third-division rimes? All controversies regarding these questions will be resolved if we analyze the fan-ch'ieh's in Chi-yün. In the series of rime-books related to the Ch'ieh-yün─the Kuang-yün and the Complete Manuscripts of Wang-yün, in particular─the initial letter which appears in all four division rimes has two different groups of fan-ch'ieh first-words: the first-, second- and fourth-divisions form one group (Group A); and the third division forms the other (Group B). These 2 groups remain distinct most of the time with only a few exceptions.