CHIROPRACTIC, a method of treatment employed in the United States based on the assumption that most disease results from displacement of the vertebrae and pressure upon the nerves as they emerge, whereby they are prevented from transmitting to the various bodily organs the mental impulse necessary for proper functioning. The chiropractor never resorts to drugs or surgery ; he merely tries to relieve the impinged nerve and leaves the rest to nature. Little was done to work out a theory in detail until 1895, when D. D. Palmer began its formulation, resulting in the development of a system of articular adjustment with the hands. He established the Palmer School of Chiropractic (Chiro practic Fountain Head) at Davenport, Ia., and later others were founded in different parts of the United States. In 1926 there were said to be about 25,00o chiropractors in some 4o of the United States, of whom 15,000 were practising. In several states they were still debarred from practice, but 37 states had laws which accorded a measure of recognition to chiropractors.