LIA2A53A LEAD INDUSTRIES ASSOCIATION 191 MAOIION AVENUE NEW YORK 17, N.

LIA2A53A LEAD INDUSTRIES ASSOCIATION 191 MAOIION AVENUE NEW YORK 17, N.

Red Lead .

On the other hand the Rrilid gov ernment announced that it would dn pose of *0,000 iom of lead from it* stockpile.

and Concentrates Scale Tickets Checked deduction of tare weight from gross weights Checked all weights to Record of Le3d Ore Received,, ; Moisture Reports Checked moisture percentages to Record of Lead Ore Received, Record of Lead Or* Received ;' .

As it happens. 1. have spent the greater part of my professional and: scientific life in the investigation of lead poisoning, and perhaps more, specifically, in the study of the physio logical arid pathological behavior of lead in the -.animal organism Including 'man, with some special attention to some of the organic compounds of load, principally tetx'aethyl lead.

. &5 . ' /' ` 1 - Original teoolotlea* wrmd by ted Lead Technical CoaaltVao a* gaiwrirgcs-- .

OR NAME SAMPLE REPORT Super Sublimed White Lead .i ;**!

The individual operating the vacuum transferring apparatus and transferring lead was exposed to excessively high concentrations of lead during the period of transfer.

The results on indicate that this man has had little or no recent lead exposure.

Division Lead Co.

Marbaker Research Department Leo S* Smith and Son Mf g, Co* 7525 Penn Avenue Pittsburgh* Pa* Dear Mr* Marbaker: In aa mu c h as I shall he away from the laboratory for the next tmo or three months* I aa replying to your letter of June 12th and turning over the correspondence to m y associate Dr* W* P* Machle* who will be prepared to work out any subsequent development of this matter if it becomes advisable to proceed before I return* In view of the prevailing attitude toward the use of lead containing materials* I should advise against your use of the lead compound for the purpose whlph you have in Blind* if it could b e avoided* I think it probable that the use of lead in the manner you describe would be in no wise hazardous* hut on the other hand* it seems quite probable that its use for this purpose would be questioned* and that if difficulties arose* you would have to b e In position to defend yourself not only against criticism but against dtusage suits* I do not see how protection could be provided except on the basis of experimental work of a very practical sort* In my opinion* it would be advisable to test the solubility of the lead in the "Vlnylite* In various aold and alkaline media* This* it would seem* could be done as well in your laboratory as here* It should also be established* I believe aa to whether there is any appreciable solution or disinte gration of the dentures under conditions of actual uae* The latter would require the cooperation of a sul table subject or subjeots* and the fate of the dentures could be determined cither by determining the residual lead, in them after a definite period of wear* or perhaps by following the lead excretion of the subject with and without the den tures* In any oase* I believe experimental work of this general type should be carried out if you consider it worth while to use this type of denture* and if you desire this type of work* we are In position to carry it out for you* tr B 00137 The cost of such work will depend, of course, upon a number of factor such a the employment of a suitable subject or subjects, the duration of the experi ment, and the number of analyses which might be required to determine the facts* In any case, the cost of this experimentation would run into same hundreds of dollars* It would perhaps be well for you to determine whether such expenditures are justified before we consider the details of the experimentation which might be carried out.

They need the thorough,protection of pure red-lead paint.

POTENTIAL EXPOSURES IN INDUSTRY 2243 Armature Workers Lead "tinning" baths and lead pots, when small and equipped with tempera ture controls, may not present serious lead exposures.

This leaves two alternatives open for consideration:(a) Employ some method of removing the lead tetra-ethyl from the fuel.