Various forms of colon cleansing were popular in the 19th and early 20th century. In 1932, Bastedo wrote in the Journal of the American Medical Association about his observation of mucus masses being removed during a colon irrigation procedure: "When one sees the dirty gray, brown or blackish sheets, strings and rolled up wormlike masses of tough mucus with a rotten or dead-fish odor that are obtained by colon irrigations, one does not wonder that these patients feel ill and that they obtain relief and show improvement as the result of the irrigation."