John Harvey Kellogg 
Colon Hygiene [PDF ebook] 
Comprising New and Important Facts Concerning the Physiology of the Colon and an Account of Practical and Successful Methods of Combating Intestinal Inactivity and Toxemia

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Man, which contains a fund of original informa tion obtained at the cost of much effort, which is both highly interesting and instructive. The author desires here to acknowledge his obligations to some hundreds of medical colleagues who’ have devoted their lives to the noble work of carrying to heathen lands the blessings of modern scientific medicine and Christian civilization, and who have found time in the midst of their arduous labors to answer the questionaire and thus furnished the unique informa tion presented in this chapter.