139. What is a Perfect rhyme?

Where the vowels have the same sound.

140. What is an Imperfect rhyme?

Where the vowels have a different sound.

141. What is Blank Verse?

A kind of metrical language in which there is no similarity of sound.

142. What is the Cæsura pause?

A rhythmic pause occurring in a verse.

143. How many rules should be observed in the use of the Cæsura?

Three.