This is an enlarged edition of the work published by the same author in 1906. The old matter has been changed, and several new chapters have been added. Among these may be mentioned two chapters on the affections of the colon and sigmoid, in which no mention is made of diverticulitis of the colon or of the sigmoid, a condition which is by no means rare. Under treatment of prolapse of the rectum the bad effects of the injection of paraffin are shown and two cases reported, one of which resulted fatally two years after the first injection. The use of paraffin in this way is properly condemned. More useful and practical points are mentioned in connection with the minor affections of the anus and lower rectum than in the more serious troubles higher up, which are discussed less satisfactorily by the author.