“…Hair was removed in sufficient quantity from the back of the head, placed in protective envelopes and air-mailed to Doctor's Data Inc, West Chicago, where it was analyzed according to ASETL Protocol by Atomic absorption spectrophotometry using an automated procedure (Alder et al, 1976). The following minerals were measured initially: calcium, magnesium, sodium, potassium, copper, zinc, iron, manganese, chromium, cobalt, lithium, molybdenum, barium, gold, silver, tin, antimony, zirconium, lead, arsenic, mercury, cadmium, aluminum, nickel and beryllium.…”