“…Since modern medical experience demonstrates a rough but useful correlation between blood lead concentration and at least certain lead poisoning symptoms (Hernberg,198o), it becomes possible to predict symptoms of lead toxicity that would have been expected in Newton's living slave population. The x-ray fluorescent method provides a small but useful body of relevant data (Ahlgren et al, 1980;Christoffersson et al, 1984;Eastwell et al, 1983;Scott, 1985). Through regression analysis of such data, using the individual's age (ascertained from the skeletal remains) as the years of lead exposure, the mean blood lead level for each Newton slave was estimated from the measured bone lead concentration.…”