In his later years my father often expressed to me his desire for the reduction of the eleven volumes of his "Papers on Health" to a compact one-volume edition; but as long as fresh papers were being written, he saw no use in beginning this work. In the end the project was interrupted by his last illness and death. Since then, circumstances have prevented the work being undertaken until the present time. Having been associated with him in his health work for some years, and having often discussed with him all his methods, I have had considerable advantages in undertaking to carry out his intention.
