Dear Doctor Kehoe: I thank you very much for putting on paper your thoughts about the classification of tetraethyl lead intoxication cases.

Stovall's letter to the Public Health Service was written in ignorance of the fact that the use of 4.5 c.c. of tetraethyl lead in aviation gasoline had been approved by the Service years before.

Stovall's letter to the Public Health Service was written in ignorance of the fact that the use of 4.5 c.c. of tetraethyl lead in aviation gasoline had been approved by the Service years before.

Be am Gentlemen* I am sending you herewith for such use as It may be to you at once, an Incomplete copy of a report on the status of the tetraethyl lead plants For a number of reasons that have been beyond my control, it has been Impossible to finish the text of this report, and since 1 shall be out of my office for the next ten days or so, I v&nt to put as much of this as I can into your hands promptly.

I may say, however, that I consider it very unlikely that you have suffered any injury of a permanent sort as the result of any exposure to gasoline containing tetraethyl lead.

I may say, h o w ever, that I consider it very unlikely that yo u have suffered any injury of a permanent sort as the result of any exposure to gasoline containing tetraethyl lead.

We shall be pleased to report our observations on the skin absorption of tetraethyl lead added to the "Vitol" mixture when the results are available.

Dr, Kdgsr has brought this patently the deposit is in the na of tetraethyl lead.

Gunn be contacted in instances of this kind* Pag 2 Mr* E. 0* Jones May 20, 1848 The third paragraph o t your latter would indicate that primary reference fuels containing orer 416 ml* of lead and "used for experimental purposes" may still be available. 1 hope that this is the proper interpretation since the use of primary or secondary reference fuels containing 6*0 ml* tetraethyl lead per gallon are not high enough i n knock ratings to properly bracket some special aviation fuels blends currently being supplied for engine durability tests by a number o f fuel companies* If our interpretation of the third para graph of your letter is correct that we still may use 6.0 ml. of leaded refer ence fuels for experimental purposes it would appear to me that we should not necessarily place ourselves i n the position of analysing each use for such materials but that these requests should be routed through Mr.

Various systematic observations on equipment developed for the use cf leaded gasoline as a fuel, from the standpoint of measurement and control of the lead hazards - (Development work on equipment for Q.M.G.

Various systematic observations on equipment developed for the use cf leaded gasoline as a fuel, from the standpoint of measurement and control of the lead hazards - (Development work on equipment for Q.M.G.

The only men wearing protective masks are those working with tetraethyl lead and those effecting tank measurements.

The only men wearing protective masks are those working with tetraethyl lead and those effecting tank measurements.

I was very sorry to have missed you on the occasion of your recent visit to Cincinnati* for I should have been pleased to talk with you about various phases of our work* I am sure you obtained all of the practically useful Information from Dr* Sanders however* so that I trust your trip to Cincinnati served your purpose* / I believe you received most of the reprints of our work ishtch were available* On the other hand there was a series of articles which had been translated into Spanish* which* X believe* will be useful to you in that language* Accordingly I have sent you,under separate cover* copies of these translations* If you should find that you require additional copies of these translations* please do not hesitate to let me know for I had these articles translated primarily for the use of medical men who are concerned with this problem* 1 should appreciate it if you would drop me a note from time to time* letting me know of your progress and specially of any difficulties which may occur# Our experience in other countries in connection with the occurrence of difficulties may well be of seme value to you if such trouble should arise* In any case I try to keep in touch with what occurs in various parts of the world in this connection* It is possible that your attention was not called with emphasis to the rather serious hazards which may be associated with the cleaning out of storage tanks which have been used over a considerable period of time for the blending and storage of leaded gasoline* We have had a series of accidents In this country which have been the result of failure to carry out the regulations which we have prescribed in connection with this work* It seems that from time to time a group of workmen will Insist upon entering these tanks for the purpose of cleaning without being supplied with the necessary protective clothing# and especially with an airline hose mask* Under certain unusual oircumstmcos \ 2* * - it may happen that concentrated Ethyl Fluid introduced into the gasoline in too rapid a stream may sink to the bottom of such tanks and lie there over a period of months or years in the sludge# This happens of course, only if there is a water bottom in the tank# Subsequently when men enter such a tank to clean it, they may have serious contact with concentrated Ethyl Fluid, and they may also he exposed to relatively concentrated vapors of tetraethyl lead# All of these things can b avoided by proper attention to the regulations which we have devised and which are given in detail in the booklet of regulations which you have# I call your attention to this point as being the one thing which is most* likely to result in serious difficulties, in order that you may warn your people against this danger and urge upon them the necessity of proper precautionary measures* Cordially yours, RAKiiS r ^ FT1 7 " k5H^710* KE" 00J34a0

Dear Sirs: I am enclosing herewith a copy of my findings on His history indicates that this patient was one of a group of men who on Tuesday, January 30* 1940, helped clean out a gasoline tank which had previously been filled with gasoline containing tetraethyl lead.