Vedic Metre in its Historical Development c12.s3.158

c12.s3.158

177. In questions not connected with final syllables few difficulties arise. It must be noticed that syllables are long by position if the vowel is followed either (i) by ch (cch); (ii) by lh; or (iii) by -nn in the third person plural of secondary tenses and in the nominative singular of participles, but rarely elsewhere. The sounds represented by ṁ ṁ ḥ also contribute to make length by position.