The Commercial Reciprocity Policy of the United States, 1774-1829. By Setser Vernon G.. Philadelphia: University of Pennsylvania Press [Oxford University Press]. 1937. Pp. xii, 305. ($3.00)

The Reciprocity Treaty of 1854: Its History, Its Relation to British Colonial and Foreign Policy and to the Development of Canadian Fiscal Autonomy. By Masters Donald C.. London, New York, Toronto: Longmans, Green. 1937. Pp. xxiv, 267. ($3.50)

Reciprocity 1911: A Study in Canadian-American Relations. By Ellis L. Ethan. (The Relations of Canada and the United States, a series of studies prepared under the direction of the Carnegie Endowment for International Peace, Division of Economics and History.) Toronto: Ryerson Press. New Haven: Yale University Press. 1939. Pp. xii, 207. ($2.75)