Industrial Combination. By D. H. Macgregor. (Series of reprints of scarce works on political economy, no. 1.) London: Reprinted by the London School of Economics and Political Science. 1935. Pp. ix. 245. (6s.) - Protective and Preferential Import Duties. By A. C. Pigou. (Series of reprints of scarce works on political economy, no. 2.) London: Reprinted by the London School of Economics and Political Science. 1935. Pp. xiv, 117. (6s.) - The Principles of Political Economy. By Robert Malthus. (Series of reprints of scarce works on political economy, no. 3.) London: Reprinted by the International Economic Circle, Tokyo, in collaboration with the London School of Economics and Political Science. 1936. Pp. liv, 446. (10s. 6d.)