""A System of Phrenology"" is a book written by George Combe and published in 1834. The book is an in-depth exploration of the pseudoscientific field of phrenology, which was popular in the 19th century. Phrenology is the study of the shape and size of the human skull, and how it relates to personality traits and mental abilities. Combe's book is divided into four parts. The first part provides an overview of phrenology, including its history, principles,...