It is not to be reprinted or published, in whole or in part, without consent of the Director of The Kettering Laboratory, 'n ,2- The following observations make up part of a general program for the study of the potential hazards associated mth the distribution and use of motor fuels containing tetraethyl lead.

Of course, his hands were covered with lead oxide, and to nay amazement, the first thing he did when he came down from the carwaik was to take from his lunch box an orange which be started to peei and eat. probably one of the most effective ways to get lead poisoning.

This discrepancy between the blood and the urinary results is characteristic of tetraethyl load poisoning.

tank of one of your company's anes are available, and it seems best that these reports bo forwarded to you for appropriate handing* A notation has come to me today through one of the representatives of Ethyl Corporation that Mr* Morris of your company has been inquiring about these results, and no doubt he will wish to be informed about them* It will be noted that the lead content of those samples is quite low* The concentration of tetraethyl lead is negligible, while the total lead content as represented by that "extractable by acid'* is so low as to have little significance from the point of view of hazard* Undoubtedly if a large quantity of scale and duet, containing such a concentration of lead were to be suspended in the atmosphere it could give rise to come hazard under conditions of prolonged exposure, but the risk of lead exposure fpom this source is certainly not very great* It appears that seme of your company*s employees have been apprehensive about their exposure to lead* #- KE n - \J V/ \) 1,!

I know nothing of the status of these, men with respect to their clinical condition or the nature or duration of their employment - However, it Is apparent from these results alone that no one of these men bar had any slgnific&Bt occupational exposure to lead* All of the results are within normal limits, being just like results that would be obtained if one. caxrled out analyses on the correspondlag materials from random individuals in the normal population of and professional people* I have a copy of Doctor .Kitmalllor* letter of November 29, and 2 wish to confirm his statement that I am heartily In favor of a comprehensive investigation of the status of your employees with respect- to occupational hazards* As Doctor- Kitsmiller lias stated, I expect to be in Miami during the Christmas period, a M if It is possible and is desirable on your part 1 should be very happy to discuss vlth you tho aocosaary details of %our work In tills . connection* If there are any specific matters that I should be prepared to discuss vith you, X should be glad to know of them at your convenience* I have just noticed that copies of the analytical reports of the material obtained from a wing tank of one of your company** jlano are available, and it seems best that these reports be forwarde& to you for appropriate handling* A notation has come to me today through one of the representatives of Ethyl Corporation that Mr* Morris of your company has been inquiring about these results and no doubt he will wish to be informed about them* It will be noted that the lead content of these samplo* is quite low* The concentration of tetraethyl lead is negligible while the total lead content as represented by that "extractable by acid** is so low as to have little significance from the point of view of hazard* Undoubtedly if a large quantity of scale and dust, containing such a concentration of lead were to be suspended in the atmosphere it could give rise to some hazard under conditions of prolonged exposure, but the risk of lead exposure from this source is certainly not very great* It appears that seme of your company*s employees have been apprehensive about their exposure to lead* K E nip'; Ut> #- KJ V/ U O Dr* Howard K.

Add 3 cc tetraethyl lead per gallon.

Research Laboratories 1600 West Sight Mile Road Perndale 20 Detroit, Michigan Dear Doctor Beatty: Thanks for sending Doctor Kehoe two copies of "The Importance of High Octane Gasoline and the LT3e of Tetraethyl Lead in Its manufacture.

Add 3 cc tetraethyl lead per gallon. 0020700

Dear Calr I have a request .for a small quantity of tetraethyl lead for the purposes of pharmacological r*esearch, from one of the laboratories of "the Chemical Warfare Service.

Research Laboratories 1600 West Sight Mile Road Perndale 20 Detroit, Michigan Dear Doctor Beatty: Thanks for sending Doctor Kehoe two copies of "The Importance of High Octane Gasoline and the LT3e of Tetraethyl Lead in Its manufacture Doctor Kehoe will be out of town until September 1 at which time he will send 7/ou any comments on the report he may have.

Gumming: I have gone over your letter concerning the new sign for the pmps for tetraethyl lead gasolene, and entirely approve of it, and I have a note from Dr.

c 0 P 15 May 194-3 Ethyl Corporation Chicago, Illinois Dear Sirs* We need a small sample of lead tetraethyl for our laboratory experiments and analysis.

Wfhera Superintendent, Tetraethyl Lead 8 "Freon" %.

Kehoe and our management yesterday, the following policy was agreed upon in connection with distribution of the medical report from the Kettering laboratory entitled "An Investigation of the Potential Hazards of Exposure to Lead Associated With the Handling and Use of Gasoline Containing An Antiknock Fluid in Which Tetramethyl Lead is Substituted for Tetraethyl Lead:" 1.

She sign is supposed to attract the attention of the motorist, however, and to give him suitable warning, so to speak, that he is purchasing gasoline containing tetraethyl lead .