The book, The Principles Of Physiology; Applied To The Preservation Of Health, And To The Improvement Of Physical And Mental Education, has been considered by academicians and scholars of great significance and value to literature. This forms a part of the knowledge base for future generations. So that the book is never forgotten we have represented this book in a print format as the same form as it was originally first published. Hence any marks or annotations seen are left intentionally to preserve its true nature.