Urine lead measurements indicate that the more rapid decrease in blood lead concentration in patients treated with both BAL and EDTA is largely due to the higher initial urinary excretion of lead in this group.

Joseph Lead Co.

Lead-White Jute Joint.

The man's brief bout of painting would not have been expected to provide a dangerous degree of absorption of lead had the paint been a lead base type.

The general exposure of our people to lead is variable from day to day, as well as seasonally, dependent mainly upon the content of lead in the food and beverages consumed from day to day; it is also variable because of the variability of the human appetite and demand for food, in that the individual may consume large or small quantities habitually, or he' may choose to eat articles that tend generally to be either high or low in lead

Joseph Lead Co.

Taking appropriate action when blood lead levels indicate an absorption of 0.08 millij^rams of lead per 100 gTams of whole blood is essential for the prevention of lead poisoning.

As to the issue of the upper limit of the so-called normal level of lead in the blood, one must consider two features of the sampling and analysis of human blood in relation to its content of lead.

APCA Absts. 361 Environmental Factors in Childhood Lead Poisoning.

Joseph Lead Co.

This result is either in error, or it is evidence of some unusual exposure to lead.

As a writer on lead poisoning, and director of the lead metabolism studies in the Kettering Laboratory, outstandingjbn the satum- inejinjfetal, I tufo to you for hoped for and kind help}!

#l by one Institution Mitch 1* exper* teheed In lead research in both eeroaelrl?

L - Contains less than 1% lead as metal based on total non-volatile.

Sam Convery National Lead Company New York, New York Dear Mr.