Chiropractic is "A system of adjusting subluxated vertebrae of the spinal column by hand only for the elimination of the cause of dis-ease and for the restoration of health". B. J. Palmer

"A subluxation is the condition of a vertebra that has lost its proper juxtaposition with the one above, or the one below, or both; to an extent less than a luxation; which impinges nerves and interferes with the transmission of mental impulses.