Document ypqKELL01DLxNLjz1MOBebQrV

October 18, 1935 Dr, Allen E, Park 3Z The Terrace Wellington Kew Zealand Dear Dr* Parks My attention was called by Mr, Tegner of the Ethyl Export Corporation to the fact that you have probably never been supplied with the available Information on the subject of lead expoaxire in association with mixing operations* Accordingly 1 am sending you under separate cover a number of articles which may bo of some interest to you* Prom time to time I have corresponded with Dr* Fairley and I think he is rather well informed of the Investigative work which we have carried out in this field* Doubtless Dr* Fairly has given you all the information at hia disposal* However* it seems wise to call your attention to the fact that tho dangers of this occupation are not great so long as the equipment is kept in proper condition, and the regulations are followed x?ith care and precision. We have had several thousand men under our care in this country for years without having had a single case of lead poisoning* This, I am sure, is because actual lead absorption has been reduced practically to the vanishing point in men engaged In this xtork, I am sure that this will be the case everywhere if tho work la done properly* Tou will note that the Initial symptoms of significant exposure to tetraethyl lead differ quite appreciably from the customary clinical picture of lead absorption* On the other hand, there is every reason to believe that prolonged slight exposure would result in the usual clinical manifestations of chronic lead poisoning* Accordingly wo make It a practice to examine every man carefully with reference to suggestive acute symptoms, as well as the blood and other clinical evidences of chronic lead absorption* Our studies on the lead excretion of men In this work have demonstrated that there occupational load absorption is insignificant if the conditions of their work are as they should be. As a consequence of these facts, I put the greatest dependence for safety in the provisions for the use of proper equipment and in the regulations for mixing, I confidently expect our medical staff to keep on the alert to see that the work is done properly. In Dr. Allen E. Paric ay opinion the medical examinations mat be regarded largely as a means of determining whether or not the precautions are adequately carried out. If any questions or difficulties arise. I trust that you will feel free to communicate with 13 and I assure you that I shall be glad to give you every possible assistance. Cordially yours. RAKjia Robert A.'Kehoe9. M D.