Indeed, it seems in some patients we were able to maintain blood lead con entration at a subnormal level.

significant excretion of lead has been found.

The problem relates to the development of lead-containing enamels to be used as coatings for the inner surfaces of tanks to be used for "service in food application and in particular for the storage and fermentation of beer."

Incidentally, in connection with the alleged exposure to lead in tobacco, through smoking, I should point out a fact that many persons have ignored; namely, that lead (probably certain other metals, but certainly lead) is found In the ash of cigarettes, and Professor Warren (2) July 2, 1963 only In trace In the smoke.

There are quite a few publications on the toxicology of lead compounds.

.- Ah+*d with l+*d BBS* April 21, 196f USAS KYCQXX AID SATRY BOUETOI To All Matber* of th# Lead Industrie* Aaaociatioe, Zd o .i SQyVTT Of LEAD H THE ATHOSPgEBB OF TCKEI QRBAJ OCWOnnH Th* long delayed report with th* above tltl* bu Juet b*a completed by the 0. 8.

Incidentally, in connection with the alleged exposure to lead in tobacco, through smoking, I should point out a fact that many persons have ignored; namely, that lead (probably certain other metals, but certainly lead) is found in the ash of cigarettes, and iti 00520 \ Professor Warren (2) July 2, i9 6 0 only In trace In the smoke.

I hardly think you will have the time, even if you should be interested, in reading or examining further into the problems of lead and lead poisoning.

There are quite a few publications on the toxicology of lead compounds, 1 00530 Harry V.

Investigations of the difference between smokers and non-smokers in the matter of the rate of excretion of lead in the urine and the concentration of lead in the blood have failed to yield convincing evidence.

Investigations of the difference between smokers and non-smokers in the matter of the rate of excretion of lead in the urine and the concentration of lead in the blood have failed to yield convincing evidence.

Fowler, Lead Industries Association Inc. , 292 Madison Avenue, New York, N.Y. 10017, U.S.

The operations observed were those at which lead was used in the compound being formed.

iy>. emsmqaui ^INTERNATIONAL LEAD ZINC RESEARCH ORGANIZATION, INC

Gordon McCullough President *Amax Lead & Zinc Div.