Analyses of the urine and blood were carried out and at that time the concentrations of lead in blood and urine gave very scanty evidence of occupational lead exposure.

Sam Convery ' National Lead Company 111 Broadway New York City, N.

Kehoe: LH-36 Lead Glazes for Dinnerware Thank you very much for your letter of May 21 regarding the release of lead from ceramic ware.

All products that do not comply with the January 1, 1973 ruling of .5$ lead will be removed from the Buyer's Guide July 1, 1972.

The pigment of this paint, white-lead, is.

All water systems that sample for lead and copper must provide a consumer notice of individual lead tap results to each location where samples were taken within 30 days of receiving results [40 CFR 141.85(d)].

The two lead materials handled were Epistatic 112 and Cyastab 988.

Russell Schell - (2) - January 7, 194-0 lead vapors were still being involved.

Personally I can see no excuse for a distributing company supplying lead-containing gasoline for other purposes than that of a motor fuel.

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

Machle, who will be prepared to work out any subsequent development of this matter if it beooraes advisable to proceed before 1 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 be avoided* I think it probable that the use of lead in the manner you describe would be In no wise haaardous* but 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 be in position to defend yourself not only against criticism but against damage 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 teat the solubility of the lead in the "Vlnyllte* 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 use* The latter would require the cooperation of a suitable subject or subjects, and the fate of the dentures could be determined either 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 oaae* 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* 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.

These have great influence in preventing lead poisoning, as much lead ean enter the*system through the finger nailsn The general principles on which we have worked is that more lead enters the system by being converted into soluble lead salt by the perspiration than * that which enters through the breathing apparatus, so that if we keep the skin and hands clean, there is little danger.

Reid began his National Lead career in 1927 with the St.

Scales Ethyl Corporation 1600 West Eight Mile Road Fernaale, Detroit, Michigan 43220 Dear Dick: I am sending to you, herewith, a copy of a report of the progress of the investigation of the fate of inhaled lead, in its present relation to the tolerable concentration of lead in the ambient air.

This Q gasoline runs close to 1.5cc of lead per gallon.