Actually I'm reading another book on the same matter, I had to retrieve the title though, it's long and funny. It has been reprinted recently, I have the kindle version. It's called
"Intestinal Ills/chronic constipation, indigestion, autogenetic poisons, diarrhea, piles, etc, also auto-infection, anemia, emaciation, etc, due to proctitis and colitis" by Alcinous B. Jamison. First edition was 1915!!
I'm not joking, the book is very interesting.