The poem 'Harlem' is an example of free verse. The meter is irregular and there is also an irregular rhyme scheme (2nd line rhyme with 4th, 5th with 7th and 9th with 10th)
1) neither….nor
2)not only ……. But also
3)both…… and
4)either.. or
5)either….or
6)both…. And
7)not only…..but also
8)weather….or
9)both…..and
10)neither….nor