(16) Solenberger, Alice W. One Thousand Homeless Men. A study of original records. Russell Sage Foundation. New York, 1911.
II. TYPES OF ISOLATION AND TYPES OF SOCIAL GROUPS
(1) Fishberg, Maurice. The Jews. A study of race and environment. London and New York, 1911.
(2) Gummere, Amelia M. The Quaker. A study in costume. Philadelphia, 1901.
(3) Webster, Hutton. Primitive Secret Societies. A study in early politics and religion. New York, 1908.
(4) Heckethorn, C. W. The Secret Societies of all Ages and Countries. A comprehensive account of upwards of one hundred and sixty secret organizations—religious, political, and social—from the most remote ages down to the present time. 2 vols. New ed., rev. and enl. London, 1897.
(5) Fosbroke, Thomas D. British Monachism, or Manners and Customs of the Monks and Nuns of England. London, 1817.
(6) Wishart, Alfred W. A Short History of Monks and Monasteries. Trenton, N.J., 1900. [Chap. i, pp. 17-70, gives an account of the monk as a type of human nature.]
III. GEOGRAPHICAL ISOLATION AND CULTURAL AREAS
(1) Ratzel, Friedrich. Politische Geographie; oder, Die Geographie der Staaten, des Verkehres und des Krieges. 2d. ed. München, 1903.