Following poetic/literary devices have been used in the poem Fog by Carl Sandburg:

1. Metaphor: It is a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable. In the poem fog and the movements of fog are compared with cat.
2. Enjambment: It is the continuation of a sentence without a pause beyond the end of a line, couplet, or stanza. In the poem, we find sentence continuing to next lines.

Read summary of this poem.