《集韵》下平声较之《广韵》下平声新增93个小韵,分布于29个大韵中的26个大韵之下。这些新增小韵特点鲜明,不仅所辖的同音字字数极少,而且这些新增小韵大多居于一个大韵的末尾,其新增的特点明显。《集韵》下平声新增的93个小韵当中,《类篇》对应地收录有其中的92个读音。探求《集韵》下平声93个新增小韵读音的来源,至少有53个新增小韵我们能够明确指出其读音来源或指出其读音来源的线索。这让我们有充分的理由相信,《集韵》下平声和上平声一样,其增收的这些小韵的读音大多实有其音,其增音的依据是可以探求的。
Compared with Guangyun, Jiyun increased 93 syllables in the first part of its level tone, and these new syllables are distributed in 26 rhymes. They contain very few words which have the same pronunciation, and most of them appear in the end of the rhyme. Among these new syllables, Leipian recorded about 81 of them. Researching on the source of these new syllables, we can at least point out the source about 53 new syllables. This allows us to have sufficient reason to believe that these new syllables Jiyun increased are all based.