The play is called The Crucible because a crucible is a container used for melting and purifying metal, and in the play, the events that unfold can be seen as a metaphorical melting pot of intense emotions and purifying of characters' true selves.
In Bram Stoker's novel "Dracula," Lucy Westenra receives blood transfusions from several characters, including Dr. John Seward, Quincey Morris, and Arthur Holmwood.
Mrs Phelps cries when Montag reads aloud the poem because it touches her emotionally and she realizes the importance of literature and how much it has been missing in her life.