She was becoming annoyed with herself for getting distracted first the billboard and now this tru when it suddenly occurred to her that the words she had just seen, "heat' and capacity were exactly what she was going to learn about today: heat capacity. She knew what each of them meant separately, but together? She had not the faintest idea. Did they have anything at all to do with her last exploration? Professor Holmes would clarify everything, Alice thought, and she took big, hurried steps in the direction of the laboratory.