Proceedings of the Ninth Annual Conference on the Nephrotic Syndrome.

Three major problems related to nephrosis are discussed informally by active investigators. The first subject taken up is that of experimental nephritis produced by antigens and antibodies, mostly in the rat. The next subject discussed extensively is lipoprotein metabolism, and the third is electrolyte metabolism. Considerable data are presented by the participants in these sessions of the conference, but practically all the papers are in the nature of progress reports. As might be expected, agreement on many important points was not achieved. Perhaps this is best illustrated by the closing remark of the chairman of the first session, on antigens, antibodies, and renal lesions. He stated that he would "have another martini with Dr. Pfeiffer to talk things over." There is considerable discussion in this conference of interest to the investigator, and the reader certainly gets a good idea of the current thought and directions of experimental nephritis, lipoprotein, and