| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Theories of Darwin and Their Relation to Philosophy, Religion, and Morality | Schmid, Rudolf, 1828-1907 | en | | | Zimmermann, G. A. (Gustav Adolf), 1850-1903 [Translator] | Evolution; Religion and science | 2007-07-26 |
| Le naturalisme au théâtre: les théories et les exemples3 | Zola, Émile, 1840-1902 | fr | | | | | 2004-10-25 |
| Early Theories of Translation | Amos, Flora Ross, 1881- | en | | | | | 2007-08-18 |
| Conflict of Northern and Southern Theories of Man and Society
Great Speech, Delivered in New York City | Beecher, Henry Ward, 1813-1887 | en | | | | Speeches, addresses, etc., American; Slavery -- United States -- Controversial literature; United States -- Politics and government -- 1853-1857 | 2008-05-31 |
| Peace Theories and the Balkan War | Angell, Norman, 1872-1967 | en | | | | | 2004-04-01 |
| New and Original Theories of the Great Physical Forces | Rogers, Henry Raymond, 1822-1901 | en | | | | Physics; Astronomy | 2008-03-20 |
| Evolution, Old & New
Or, the Theories of Buffon, Dr. Erasmus Darwin and Lamarck,
as compared with that of Charles Darwin | Butler, Samuel, 1835-1902 | en | | | | | 2007-11-09 |
| The Problems of Psychical Research
Experiments and Theories in the Realm of the Supernormal | Carrington, Hereward, 1880-1959 | en | | | | | 2007-11-29 |