From what I remember the lady at the house tries to change him into a good school boy. She gets him new clothes, makes him go to school, and look nice. Sorry if this doesn't help
The novel throughout its story line exemplifies that Huck was dwelling between his personal beliefs and social conformity. From the very beginning, we see his reluctance to Widow Douglas' and <em> Miss Watson's efforts to make him "sivilize" as he believed it to be more confining and at the same time longing for being "respectable". </em>In the beginning, he was stimulated with his new life of sanitariness and yet feared to be called a "runaway slave" which is quite reminiscent of his inner struggle and dilemma. However, he flees with Tom to escape the social conformity of widow Douglas' house yet at the Cruise Huck calls her(Douglas) his family to the gang of robbers. In fact, throughout the story, he is living with this struggle and attempting to vent it out.
All of the nouns used (hammer, chain, furnace, brain, anvil) are explaining mighty things that the tiger is being compared to. The poem is simply saying that they are smart, speedy, and strong.