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To the Editor:—
In The Journal, July 5, 1941, page 20, Francis Carter Wood reported on studies he had made of the incidence of lead in urinary calculi. He drew attention to the finding by Trumper and Gordy (The Journal, March 29, 1941, p. 1389) of 3 per cent of lead in a phosphatic ureteral calculus while the urine contained lead in so-called normal amount. Dr. Wood compared the lead content of urinary stones of the vintage 1850-1860, examining 20, all of which contained lead, thus disproving any deduction that ethyl-lead gasoline necessarily accounts for increased lead output in the urine today. He also mentioned the fact that traces of copper and silver were regularly present, as well as other metals.At a meeting of the Pathological Society of Eastern New York, Dec. 9, 1932, Dr. Gustavus H. Klinck Jr. (Arch. Path.15:751 [May], 16:598 [Oct.] 1933), then
Jacobsen VC. LEAD AND SILVER IN URINARY CALCULI. JAMA. 1941;117(18):1557–1558. doi:10.1001/jama.1941.02820440065025
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