| title | creator | language | description | tableOfContents | contributor | subject | created |
| The Egyptian Conception of Immortality | Reisner, George Andrew, 1867-1942 | en | | | | | 2004-05-01 |
| The Machinery of the Universe
Mechanical Conceptions of Physical Phenomena | Dolbear, A. E. (Amos Emerson), 1837-1910 | en | | | | | 2009-07-18 |
| On the Reception of the 'Origin of Species' | Huxley, Thomas Henry, 1825-1895 | en | From Life and Letters of Charles Darwin | | | Evolution; Darwin, Charles, 1809-1882. On the origin of species | 2000-02-01 |
| Essays on the Materialistic Conception of History | Labriola, Antonio, 1843-1904 | en | | | Kerr, Charles H. [Translator] | | 2010-06-01 |
| The Case and Exceptions
Stories of Counsel and Clients | Hill, Frederick Trevor, 1866-1930 | en | | | | | 2010-05-02 |
| Conception Control and Its Effects on the Individual and the Nation | Barrett, Florence E. | en | | | | | 2004-10-31 |