do not consider it a panacea for the Ind ustrial Lead problem.

The porphyrin test does not indicate high lead exposure as soon as urinary lead determinations, and both tests should be used whenever possible.

OHL suggests treatment of workers with high ur inary lead values (over .2 mgs.

Be , Durand Benjaiftin - (2) - May 15, 1954 there is no valid means, medically, of preventing occupational lead poisoning On the other hand, if the principle is understood and applied, occupational lead poisoning can be eliminated completely.

My supply of reprints of this article Is exhausted* We have other clinical data on tetraethyl lead poisoning which has not been published bub which I hope to get into print some time in the near future* The article on "The Behavior of Lead in the Animal Organism II Tetraethyl Lead", and the series of articles "On the Normal Absorption and Excretion of Lead" are among the last of my copies.

LEAD INDUSTRIES ASSOCIATION Graybar Building, 420 Lexington Avwnu* Nww York, K Y.

The weight of the bio d specimen was 13*6 grams and it contained 0.055 mg. of load per 100 grams, by the dithisone method* This concentration of lead in the blood Is. soon only with some exposure to lead* It is less than that usually seen in men with lead colic.

My supply of reprints of this article Is exhausted* We have other clinical data on tetraethyl lead poisoning which has not been published bub which I hope to get into print some time in the near future* The article on "The Behavior of Lead in the Animal Organism II Tetraethyl Lead", and the series of articles "On the Normal Absorption and Excretion of Lead" are among the last of my copies.

All Concentrator production is considered shipped, used a Lead Plant Receipt# and the Lead Plant carries all inventories.

Their representatives then made the customary test with a lead-in-air analyzer and declared the tank to be lead-free.

If these surfaces were painted with lead-containing paints.

This paper related to maximum allowable concentrations of lead In air of workshops.

Louis Lead & Oil Works, St.

Bvea if it war, the cost of the equipment per pound of lead recovered would be extremely high.

These have grown out of our exten sive work on industrial lead poisoning, its diagnosis and prevention.