[Chronologic course of the content of lead, cadmium and zinc in human bones in France].

The concentrations of Pb, Cd and Zn have been determined in human bones from the past 5,600 years. During this time the level of Zn in bones was stable. Concentration of Cd was low and stable throughout the ages until it increased recently by an order of magnitude. Concentration of Pb increased by one order of magnitude in the Middle Ages and returned again to a low level in the contemporary population of Paris.