The History of Natural Hygiene and Principles of Natural Hygiene is a book written by Herbert M. Shelton, which delves into the history and principles of natural hygiene. The book is divided into two parts, with the first part focusing on the history of natural hygiene, and the second part focusing on the principles of natural hygiene.In the first part, Shelton traces the roots of natural hygiene back to ancient civilizations, and discusses the contributions...