Abstract
The urinary Pb and As conc. values were detd. on morning specimens from 46 subjects (28 adults and 18 children) having no known exposure to Pb arsenate. Urinary phosphate, pH, and sp. gr. measurements were also made. A wide range in conc. values and in other detns. was found. The children showed nearly the same range in values as the adults and the avgs. were nearly alike. For the population studied no evidence was discovered to indicate that children as a group differ significantly from adults in their urinary Pb or As conc. values.

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