A deterrent--actually a brass-knuckled drubbing of chiropractic where so much outright, outrageous charlatanism prevails and has ever since its founding father (an Iowa grocer) and son formulated the Palmer method of palming the spine. In his own words, its functions are ""to support the head...the ribs...(and) the chiropractor"" which it does at a guesstimated $15,000 a year. On the theory that the back is the seat of all discomfort, they proceed from there to deal with anything from acne to ulcers, cancer to nephritis. Often fatally. Mr. Smith posed both as a patient and chiropractor in various installations, documents his expose with their official literature as well as actual malpractice cases, and pleads for stringent state legislation...No matter how severe the crick, it should stiffen the spine of any member of their clientele. Assuming that they read.