August 7 1957 Dr# 0 lU Weaver Duval County Hospital Jacksonville Florida Dear Doctor Weavers have just heard by a somewhat eiroultous route that you have seen a case \ihIch you believe to be lead poisoning In a man oho is said to have washed a truck (presumably with leaded gasoline)* 'he patlentfs nano was Over a period of some years* my associates and 1 have been studying the problem of load absorption in relation to leaded gasoline* and we have investigated directly or indirectly all cases of alleged lead poisoning that have been reported to us through various channels* I might say* parenthetically* that we have been unable to find any oases of poisoning or any etldeaee which would lead us to believe that load poisoning is possible as a consequence of contact* even over long periods of time* with gasoline containing tetraethyl lead* However wo are still on the lookout for such oases* and 1 should appreciate It very deeply* therefore* if you would report to me In the self-addressed stamped envelops* your findings in this case* together with all of the pertinent facts as to exposure and the patient's occupation* Moreover* if there is anything which we can do by way of investigation or laboratory determinations which would tend to substantiate or clarify the diagnosis in tills case* 1 should be pleased to do so.

Since such compounds as tetraethyl lead, lead acetate and lead oleate are readily absorbed through the skin, we are prone to question this character istic of the two compounds in question.

Calelise-lead Orlds* - Upton R.

Mar 19, 1953' Mr# Uanfred Bowditch Lead Industries Association 120 Lexington Avenue Ho t York I?

The brain contained only slightly more lead than docs the normal brain.

iuf B P I have noted with interest your effort to promote the use of lead products, la this X have heartily concurred* la , our particular field,the pigment color industry, the Us of lead chromate pigment is being reduced because of labelling ropila- fcioua and the current wave of toxicity consciousness of eome of; our public official,' A Oup own experience with the lead chro mates is that they do not have the samei'toxic potential a some ' of the more soluble compounds of lead, but that does not sec to ak much difference to those who want to put through a law or a regulation, and all lead compound -are considered in the same category, It would be my opinion that your Association could do the lead producer a service by protecting the colored lead pig ment industry and drawing to someone1 attention- that the^e is a difference in the toxicity of the various forms' which lead may appear in* -. ..

Calelise-lead Orlds* - Upton R.

i' : It would be my opinion that your Association could do . the lead producers.a service by protecting the colored lead pig f ment industry and drawing to someone*s attention that thef is a difference ia the toxicity of the various, forms' which lead say appear in : . - .

Hayward s u b j e c t lead Pigments ANSWERING LETTER OF You will recall that in February, 195^ you provided me with the attached list of trade sales products which contained lead pigments.

Since such compounds as tetraethyl lead, lead acetate and lead oleate are readily absorbed through the skin, we are prone to question this character istic of the two compounds in question.

LEAD INDUSTRIES ASSOCIATION o c a s t 4i cTNcrr Hd* TOW !

LEAD INDUSTRIES ASSOCIATION o cast 4i cTNcrr Hd* TOW !

As a chelating agent, it removes lead ions from further action, and allows the soft tissues to be freed of their lead quickly.

Th total effect is to differentiate garage m echanics, as a class, from the handlers and Users of leaded gasoline, by reason of a barely significant in crease in the m ean level of th e ir U rinary lead excretion, and by a somewhat le ss pronounced in c re a se in the lead concntrtion in th e ir blood (the u rin a ry v alu e is about 0, 05 m

Cur technical manual, "Lead in the Ceramic Industrie!