Concerning the cure… this is the information I have….
Years ago I found this in the 1919 Annual Report of the American Medical Association…
GUETHS CANCER CURE 103 Salicylic acid was determined approximately by acidifying a portion of the preparation with hydrochloric acid, shaking with ether until extraction was complete, shaking the united ether extracts with very dilute ammonia water, acidifying the ammonia solution, extracting the latter repeatedly with chloroform, evaporating the chloroform, drying the residue over sulphuric acid and weighing. The residue was slightly contaminated with emodin-like substances but did not appear to be seriously impure. The melting point was not taken, as the substance was identified by the ferric chlorid test and by precipitation with iodin in alkaline solution. It was not thought worthwhile to determine the salicylic acid by the iodin method.'
GUETH'S CANCER CURE Inquiries were received concerning the composition of Gueth's Cancer Cure, and a specimen was sent by one of the correspondents.
The specimen had an odor like acetic acid, a strong acid reaction to litmus, and appeared to contain some vegetable drug in suspension.
Acetic acid was identified by the odor, and by the dark red color which was given on adding a few drops of ferric chlorid test solution to a portion of the filtrate obtained by removing the solid matter from some of the preparation by filtration. Microscopic examination indicated the presence of powdered sanguinaria (blood root). The presence of blood root was confirmed by extraction of the mixture with ether, after making alkaline, and treatment of the ethereal solution with a drop of hydrochloric acid. A beautiful red precipitate was formed which settled out of the ether. A solution of this precipitate in water gave the usual reactions for alkaloids.
The examination indicates that the preparation consists essentially of a suspension of powdered sanguinaria (blood root) in acetic acid. Quantitative determinations were not made. Years ago blood root, because of its irritant properties, was thought by some to be of value in the treatment of cancer. It never attained much popularity with the medical profession and has long since fallen into disuse.
1. J. of Assoc. Ag. Chem. 1:343. 1915.