Document xd5V5vdrL6qjJo8mVNyjLJZgG

to beciC R. E, Keller - QUEENY February 27, 1907 Dr, M, J, Thomas Research Division Building Do. 33 national Cash Register Dayton 9, Ohio Dear Dr. Thomas: Attached is a photostat of the original paper of Dr, Jensen in Sweden, relating to polychlorinated biphenyls. I will be happy to have your ideas after you read it. As far as the section on toxicology is concerned, it in true that chloracno and liver trouble can result from large donas, V/'nothor or not this ir. at all relevant to snail quantities existing in human fat is, of course, an entirely different question. At any rate, I believe before wo worry about the toxicological part of the problem, we should settle, the analytical part. . Sincerely, RKK/ln att. P.,, Emmet Kelly, M, I). Medical Director MOMS 0a8L46 1 LEXOLDMONOOI526 WATER_PCB-SD0000007179