Public Opinion and Political Dynamics. By Marbury Bladen Ogle Jr., (Boston: Houghton Mifflin Company. 1950. Pp. v, 362, $3.50.)The Discourses of Niccolo Machiavelli. Translated with an introduction by Leslie J. Walker. (New Haven: Yale University Press. 1950. 2 Vols. Pp. xiii, 585; v, 390. $15.00 per set.)A Study of Power; World Politics and Personal Insecurity. By Harold D. Lasswell. Political Power. By Charles E. Merriam. Power and Conscience. by T. V. Smith. (Glencoe, Illinois: The Free Press. 1950. Pp. v, 307; vii, 331; xv, 373. $6.00.)The Open Society and Its Enemies. By Karl R. Popper. (Princeton: Princeton University Press. 1950. Pp. xii, 732. $7.50.)Perspectives on a Troubled Decade; Science, Philosophy, and Religion, 1939–1949. Edi