As in the previous review written one year ago, I make no attempt to include all of the numerous articles which have appeared in this field but merely review some of those which most clearly indicate the present trend of thought and those which mark new advances in the frontier of knowledge.
GLOMERULONEPHRITIS
Concerning the etiology of diffuse glomerulonephritis, some of the most important work of the last decade is that of Longcope and his associates, an initial report of which appeared in 1927.1 The sequel to this work has recently been reported by Winkenwerder, MacLeod and Baker,2 who have made an analysis of the associated infections in 78 cases of hemorrhagic nephritis, 40 of which were included in the original report of Longcope in 1927. Thus it becomes possible now to give a better evaluation of the work of the Longcope school than would have been the