The Patent Hat: Designed To Promote The Growth Of Certain Undeveloped Bumps (1855) is a book written by Philo. The book is focused on the idea of a hat designed to promote the growth of certain undeveloped bumps on the head. The author claims that these bumps, which are associated with specific mental faculties, can be stimulated by the use of a specially designed hat. The book provides detailed descriptions of the hat and its construction, as well...