A man had a bad fracture of the wrist, which was taken care of by a regular physician. After the fracture united, the joint he said continued to be very weak, but it did not prevent him from getting a livelihood by doing light work in a factory. More than a year after the accident, the wrist became quite sore. Rest and some appropriate applications would probably have restored it to its usual condition in a short time. But he was persuaded to show it to a famous bone-setter, who lived a few miles distant. The bone-setter said at once that it was not set right in the beginning, and that it must be broken over again, in order to set it as it should be done. The great violence he did to the joint produced a severe inflammation. It was in this state that I first saw it. Abscesses formed in consequence of the inflammation, and the final result was that the arm was rendered useless for life. If this man had been thus treated by an educated surgeon, instead of an _infallible_ bone-setter, he could undoubtedly have recovered large damages for such mal-practice. The second case which I shall relate is that of a young man who had a chronic disease of the shoulder, which came on gradually, without any evidence that the joint had ever received any injury. A bone-setter, whom he accidentally met, assured him that he could remove the difficulty, and give him a good arm. He told him that the bone of the arm had ‘dropped down out of the socket,’ that there was ‘callus in the socket,’ and talked about ‘squeezing it out.’ This opinion he gave without any examination of the shoulder. He did not even remove a thick overcoat which the young man had on. He directed a liniment, which was to be used for some time previous to the operation of setting the shoulder. After using the liniment for six weeks, he went to the bone-setter’s residence to be operated upon. Three stout assistants held the patient, while the bone-setter _squeezed out the callus_, and set the joint. The pain produced by this operation was so severe that the young man fainted. The bone-setter, thinking that the joint was not yet quite right, repeated the operation the next day. The consequence of all this violence was an increase of the inflammation. There was much soreness and pain, and at length several abscesses appeared in succession, which discharged abundantly, and the arm became exceedingly weak, very limited in its motions, and much emaciated.