10 MEDICAL INSTRUMENTS, NAMELY, A HAND HELD CHIROPRACTIC ADJUSTING INSTRUMENT AND ACCESSORIES NAMELY PALM AND FINGER PADS, TIPS, MARBLE DEMONSTRATOR TABLES HOLSTER ADJUSTING SHOES AND LEG LENGTH MEASURE; A SYSTEM FOR NON-INVASIVELY DETERMINING DYNAMIC STIFFNESS OF THE CERVICAL SPINE COMPOSED OF A DYNAMIC FORCE APPLYING APPARATUS FREQUENCY MEASURING AND DETECTING APPARATUS AND DATA PROCESSING APPARATUS FOR CALCULATING FREQUENCY RESPONSE OF MUSCULAR SKELETAL STRUCTURES