Revel in the obsolescent pseudoscience of Phrenology, the study of how bumps on the skull correspond with specific mental traits. Do you suffer from a lack of mirthfulness, or an over-abundance of suavity? That bump on your head might tell you if you do. What about amativeness, or vitativeness, or philoprogenitveness? The study of phrenology has a language all its own. The front of this piece maps out the various areas of the head, each with its own uniquely etched pattern, along with a number that corresponds with diagnostic words on the back.