The most common metrical form is the iambic fifteen-syllable verse in a rhyming couplet, although a poet may use eight-syllable, six-syllable or even nine-syllable verses.

UNESCO: Tsiattista poetic duelling

If conductors are judged not as metrical disciplinarians but as shapers of musical life, Koussevitzky might have been the greatest of them all.

NEWYORKER: Fresh Breezes

This is the beginning of a most extraordinary correspondence, which lasts almost a quarter of a century, until Emily Dickinson's death in 1886, and during which time the poet sent Higginson almost one hundred poems, many of her best, their metrical forms jagged, their punctuation unpredictable, their images honed to a fine point, their meaning elliptical, heart-gripping, electric.

NPR: Excerpt: 'White Heat'