Phrenology is a pseudoscience in which the bumps on the skull are measured in order to predict mental traits. Phrenology was very popular well into the Twentieth Century but it has now been totally discredited by scientists.
In 1875, Prof. G. Lorraine Linder, a phrenologist and physiologist, was advertising his service of phrenological examinations to be offered at the Adkins Hotel in Smithville, Ont. According to the advertisement, Prof. Linder was a medical doctor, a lawyer and a practical phrenologist and physiologist.
In 1901, Miss Gladys Coyle Drope had a phrenology chart done by Dr. Mark Mendelson. These are some of the pages from that chart.