This description of a model system for cell differentiation and organogenesis is written by one of the foremost researchers in the area. The main emphasis is on the mammalian kidney, but the book also deals with the development of the transien excretory organs. It includes discussions of induction, proliferation, early cytodifferentiation and morphogenesis and organogenesis. This authoritative account will be valuable to developmental biologists and also to scientists working in paediatric nephrology. As it gives the background of normal development and of control systems, it will also be of use to nephrologists working on abnormalities in the urinary tract.