The role of the senate has changed much in recent years and—judging by the amount of recent public discussion on its role—might change even more in the future. This new study, the theoretical framework and theoretical discussion of which lift it out of the merely descriptive, contains a great deal of well-marshalled new material, from manuscript and ephemeral sources as well as from the printed Senate Debates Journals, and Reports of Committees. Little is generally known about the Senate, and of what little, much is erroneous. Professor Kunz's mass of detail and factual data, along with his evaluation of second chambers and of the performance of the Canadian Senate in particular, will do much to remedy this situation.