July 13, 1955 Dr, Harold A.

ETHYL CORPORATION WESTEHN REGION 1141 HUNTLEY DRIVE LOS ANGELES 26, CALIFORNIA January 21, 1958 Dr.

Mineral Products Laboratory September 17, 1956 TIPICAL CTSTOmt PROBLEMS 1.

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THE LEAD CONTENT OF THE URINE AND BLOOD OF CERTAIN OCCUPATIONAL GROUPS WITHIN THE POPULATION OF CINCINNATI. : IN RELATION TO THE DISTRIBUTION OF PARTICULATE INORGANIC-------L COMPOUNDS OF LEAD IN THE AMBIENT ATMOSPHERE INTRODUCTION In the initial draft of a report entitled, "Survey of Atmospheric Lead in Three Urban Communities," prepared for distribution by and within the Working Group on Atmospheric Lead Contamination, it was pointed out that the investigation of the effects of the general environmental exposure to lead of persons within the population of Cincinnati was to proceed along somewhat different lines than those carried out in either Philadelphia or Los Angeles.

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September 19, 1952 Mr.

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