Chronic lead poisoning has never been seen in association vith exposure to these organic lead compounds.

These two men are being followed In parallel observations designed to demonstrate the least incremental Increase in the concentration of lead in the atmosphere (above the usual level In Cincinnati) which will just barely induce an increase in the output of lead in the urine, (the latter being the most sensitive evidence of an Increase in the rate of absorption of lead).

Vhether this is actually the result of lead in the tissues or vhether it is change indirectly due to the presence of lead in the tissues, is a matter of no consequence.

-White Lead White Lead Department, Fast Chicago, Ind.Zino Oxide Lead Refining Dept., last Chicago, Ind.

Any other position could lead eventually to approach- 1 ing the intake beyond which lead begins to accumulate in the body.

The following data compare the organic lead in the atmosphere with the particulate lead filtered from the air. ' - .., ' -/."

-I 1 j ; 8410 QO * Mhlta lead Department, East Chicago, Ind* Lead Befinlncr Decart*ntT Itaat Chicago.

National Lead Co.

Werntz related to lead exposure has no scientific foundation Dr.

Werntz related to lead exposure has no scientific foundation Dr.

These samples were analyzed for total metals (arsenic, antimony, barium, beryllium, cadmium, chromium, cobalt, copper, lead, mercury, mercury, nickel, silver, selenium, thallium, tin, vanadium, and zinc).

Multiyear Lead Uptake, which implements the SASO lead uptake model.

As a part of the lead studies, the hygienic significance of the distribution and use of gasoline containing tetraethyl lead as a motor fuel has -,been tinder investigation.

The biological problem, however, relates not so much to the presence of lead ^.n the human (animal) environment, as to the lead that gains access to the human (and other animal) organism.

TOTAL LEAD ASSESSMENTS $ 36,: ' ..