The Conference "Chemical and Immunologic Approaches to the Cell Surface" was organized as a multifaceted interaction between scientists representing various disCiplines impinging on membrane bio logy. In many instances, this broad mixture of investigators yielded quite unusual scientific associations and interesting new dimensions to old prob lems, as the workers came to appreciate the advallces, the shortcomings, and the hurdles of each area. Structural concepts of the membrane--the nature, orientation, and inter-relationship of components--are emerging primarily from work on erythrocytes....