ATTACHMENT 2 Memorandum from Thomas Shipman, Los Alamos Health Division, to Drs. Knowlton and Carter, February 16, 1949. Subject: "Analyses of Q-Building Blood Counts." ACHRE No. DOE-021095-B-2, (1 p). February 16, 1949 Drs. Norman Knowlton & Robert Carter T. L. Shipman, M. D., Health Division ANALYSIS OF Q-BUILDING BLOOD COUNTS REFERENCE:LAB-H I have recently gone over with considerable care the Analysis of Q- Building Blood Counts which was recently submitted, gone over it with more interest than understanding. As was mentioned in the summary, it is obvious that significant changes in total and differential counts were, for all intents and purposes, observed in no group except the Bayo chemists. It seems to me that during coming weeks a strenuous effort should be made to produce some useful information out of the figures presented and I suggest a rather intensive study to produce a correlation between the blood counts and the individual exposures of the Bayo group alone. It would probably be advisable to add to the list as controls a few names from other groups where there appears to be a decreased count, and also a few obviously normal individuals for whom records exist. There is no question but that this report indicates that we not only can do fewer blood counts but also that our methods of recording counts and exposure are pretty lousy. I suggest that you discuss the overall problem with Tom White before proceding too far so that the work may be done in a way to produce information useful and available to him as well as to you. T. L. SHIPMAN, M. D. Health Division Leader cc:Thomas H. White File REPOSITORY - LANL/RC COLLECTION - TR - 6704 BOX NO. - G3 - B242 FOLDER - 27 Hematology