The lead source was not identified until 1904, when a researcher traced it to the paint used on railings and verandahs. At this time they linked lead poisoning as a cause of convulsions in children. Lead is a metal found virtually everywhere even today. Sources of lead include auto body shops, electric storage batteries, glazes for china dishes, crockery, insecticides, electric cable insulation, hose, pipe, sheet and floor coverings. Lead is associated with stain glass work, jewelry making and antique ceramic doll painting.
Children are also in closer contact with their lead polluted environment during play.
They are more active and exposed to outdoor contaminates and they inhale dust and dirt that are lead contaminated. Lead toxicity may also occur transplacentally and be detrimental to the neurological development of the fetus. In the 1950 s and 1960 s, lead poisoning was found to be prevalent in the slums of the inner cities. The flaking paint on walls, the chipping plaster ceilings, and the old furniture exposed these children to a real hazard. Pica was an important contributing factor and children, ages 1 to 3 were at the greatest risk.