machine ;ould Dr. McDonald added. Dr. McDonald warned, however, against indiscriminate use of the X-ray shoe-fitting device, pointing out that too frequent use of correctly-adjusted be dangerous. "Customers should be limited to a maximum of three fittings in one day and 12 fittings in any year." he advised. "Customers should not be allowed to operate the machine and number of X-ray fittings in any one store should be limited to in any one day, as a protection gales personnel and others assigned to work near the device. "For continued safe operation the machines should be kept in good repair, the metal filter in the of the foot opening should be protected from wear, and the intensity of stray radiation should be checked frequently." the the on office Cooley. eighth X-Ray Machines For Shoe Fitting Kept in Repair JACKSONVILLE, --fSpecial) -Of the U shoe - fitting X-ray machines in Florida found emitting too much stray radiation, eight have been corrected and placed back into service, says the Florida State Board of Health. The remaining six are being readjusted and are being withheld from operation pending a check to be sure they can be used within safe limits, says Dr. John M. McDonald, director of the state health agency's Division of Industrial Hygiene. That division made a survey of 110 of the X-ray shoe-fitting "machines in Florida and found only 14 operating beyond safe limits, Hoover Dam on the Colorado River is 726 feet high.