Waller.

But if a diphthong precede the last consonant the rhyme must begin at that vowel of it whose sound most prevails; as,

"Next to the Pow'r of making Tempest cease,

Was in that storm to have so calm a Peace."

Waller.

If the words accented on the last syllable end in any of the vowels, except mute e, or in a diphthong, the rhyme is made only to that vowel or diphthong. To the vowel; as,

"So wing'd with Praise we penetrate the Sky,

Teach Clouds and Stars to praise him as we fly."—Waller.

To the diphthong; as,

"So hungry Wolves, tho' greedy of their Prey,