| title | creator | language | description | tableOfContents | contributor | subject | created |
| Tractatus Logico-Philosophicus | Wittgenstein, Ludwig, 1889-1951 | en | | | | Logic, Symbolic and mathematical; Language and languages -- Philosophy | 2004-05-01 |
| The Botanic Garden. Part II.
Containing the Loves of the Plants. a Poem.
With Philosophical Notes. | Darwin, Erasmus, 1731-1802 | en | | | | Plants -- Poetry; Natural history | 2004-01-01 |
| Browning as a Philosophical and Religious Teacher | Jones, Henry, Sir, 1852-1922 | en | | | | | 2004-09-30 |
| A Philosophicall Essay for the Reunion of the Languages
Or, The Art of Knowing All by the Mastery of One | Besnier, Pierre | en | | | | | 2005-04-18 |
| Answer to Dr. Priestley's Letters to a Philosophical Unbeliever | Turner, Matthew, -1788 | en | | | | | 2004-11-22 |
| The Temple of Nature; or, the Origin of Society
A Poem, with Philosophical Notes | Darwin, Erasmus, 1731-1802 | en | | | | Life -- Origin -- Poetry; Cosmology -- Poetry | 2008-10-09 |
| Voltaire's Philosophical Dictionary | Voltaire, 1694-1778 | en | | | | | 2006-06-12 |
| Philosophical Transactions of the Royal Society - Vol 1 - 1666
Giving some Accompt of the present Undertakings, Studies,
and Labours of the Ingenious in many considerable parts
of the World | Various | en | | | Oldenburg, Henry, 1615?-1677 [Editor] | | 2009-05-11 |
| Philosophical Letters of Frederich Schiller | Schiller, Friedrich, 1759-1805 | en | | | | | 2004-12-08 |