Document BwwKyXJ7DN0gBMKJYydpxZ7E

Dr. Hooert a . IZehoe Assoc, prof, of Physiologyuniversity of Cincinnati College of Medicine Cincinnati, Ohio Urbama, Illinois May.28, 1937 My dear Dr. hehoe: Some members of the staff in our Agricultural Ex perimental Station are planning to conduct experiments on the toxicity of lead arsenate left on apples as a result of s-nraying. As you know, the united States Department of Ag riculture has placed a limit of .018 grains of lead and .01 grains of arsenic trioxide per pound of apple. This is two and one-half parts per million of lead and about 1.4 parts per million of arsenic. Our experimenters are considering feeding adults a pound of apples per day for possibly five months with an average lead content of .03b grains and of arsenic trioxide .02 grains per pound, or five parts per million of lead ana 2.S parts per million of arsenic. If I am not imposing unduly upon your time, will . you not kindly advise me whether, in your judgment, such an experiment is a material risk to those taking such amounts of lead and arsenic daily over a period of five months? Thanking you in advance for any consideration you may gi e this request, I am Cordially yours. JMB/vef J. Howard Beard, M. D. University Health Officer