Some years ago Doctor Dameshek and his group prepared a reprint of their exhibit on Hemolytic Syndromes presented at the 1942 Convention of the American Medical Association at Atlantic City. This work on The Spleen and Hypersplenism is a comparable publication consisting of a reprint of an exhibit presented at the 100th Anniversary Convention of the American Medical Association in June 1947. Publications of this type have answered an expressed desire on the part of physicians who have attended the scientific sessions of the Convention of the American Medical Association.