Document 71XRnZn9vLr5z3poLwQdB10VB

THE UNIVERSITY OF BRITISH COLUMBIA \ANCOUVER 8, CANADA DEPARTMENT OF GEOLOGY December 2nd, 1963* Dr. Robert A. Kehoe, M.D., Department of Preventive Medicine and Industrial Health The Kettering Laborat ory, University of Cincinnati. Cincinnati, 19, Ohioi Dear Dr. Kehoe: Thank you very much for your letter of November 19th. appreciate very much your taking the time out to drop us a line when you h ave been even busier than usual because of the death, of your associate. Professor Prank Princi. When I was in New York I learned of this unfortunate happening - I believe from Mr. Fowler of the Lead Research Association. most important, The one point which you raised in your letter is of course Our remarks about the toxicity of lead resulted frcre a quotation from Professor Artnur Vernes in his book "Mesure es Medecine", Paris 19^3, chap. XIV, page 278 t an English translation being approximately as follows One remark has to be done about the use of lead (acetate), pc isonous even in dose of the order of a few hundreds of milligram; one must use it with great precaution, X n current practice, and when its,turn to be used comes, we mai:e only 2 shots per week, at 2 or 3 days distance, separated by shots of platinum or iridium given during the other four days." would not like you to think that we had carelessly inserted this comparison, and, should I be unfairly representing Professor Vernes, I would certainly be grateful for your help in correcting the matter. The meeting in New York was most successful in that Dr. Kurland and Dr. Banta, and many others concerned with health problems had a most useful p art in the program, together with agriculturists and geologists from many parts of lJorth America. hope that some of these papers are published in due course, and that seme useful co-operation may result. Dr. Robert A. Kehoe, .2. Knowing your interest in the matter of lead you may be interested to know that recently we have had sane lettuces submitted to us for analysis, and, although their`'normal11 lead content seemed to be of the order of from 2 to 10 parts per million (oven-dried), we did get one sample running a prodigious 250, and several running in the range of from 50 to 100 parts per million* have been wondering whether this has any significance or not. The Medical Officer who submitted these samples sert them from a district which he has been investigating for many years, and which contains abnormal numbers of dbaths from cancer. I am afraid we are imposing perhaps too frequently on your good nature, but, as you have surmised, it is extremely difficult to make advances in this field when onefe knowledge is largely geological. Kindest personal regards. Yours sincerely, Harry "V. Warren/ Professor, Department of Geology. HVW/w, 00534