From the 1930s to the 1950s, 'fluoroscopes' used strong x-rays to let customers and employees of many shoe stores consider shoe 'fit'. Each second they were tur

From the 1930s to the 1950s, 'fluoroscopes' used strong x-rays to let customers and employees of many shoe stores consider shoe 'fit'. Each second they were turned-on exposed customers -adults and children- to a year's worth of natural exposure. And employees? New medical technologies should be avoided during the de-bugging stages. Guinea pigs are underpaid.