- Philosophy--Addresses, essays, lectures (60)
- Bernard, Claude, 1813-1878 (3)
- James, William, 1842-1910 (3)
- Metaphysics--Addresses, essays, lectures (3)
- Ravaisson-Mollien, Felix, 1813-1900 (3)
- Frege, Gottlob, 1848-1925--Addresses, essays, lectures (2)
- Logic--Addresses, essays, lectures (2)
- Political science--Addresses, essays, lectures (2)
- Psychology--Addresses, essays, lectures (2)
- Sociology--Addresses, essays, lectures (2)
- Time--Addresses, essays, lectures (2)
- Artists in literature (1)
- Belief and doubt--Addresses, essays, lectures (1)
- Bloch, Ernst, 1885- --Addresses, essays, lectures (1)
- Civilization, Modern--Philosophy (1)
- Dialectic--Addresses, essays, lectures (1)
- Education--Addresses, essays, lectures (1)
- Education--Philosophy--Addresses, essays, lectures (1)
- German fiction--History and criticism (1)
- German language--Style (1)
- History--Addresses, essays, lectures (1)
- History--Philosophy (1)
- Infinite--Addresses, essays, lectures (1)
- Intuition--Addresses, essays, lectures (1)
- Kamlah, Wilhelm--Addresses, essays, lectures (1)
- Kamlah, Wilhelm--Bibliography (1)
- Man--Addresses, essays, lectures (1)
- Mathematics--Addresses, essays, lectures (1)
- Mathematics--Philosophy--Addresses, essays, lectures (1)
- Ontology--Addresses, essays, lectures (1)
- Phenomenology--Addresses, essays, lectures (1)
- Philosophy, American--Addresses, essays, lectures (1)
- Philosophy, German--20th century (1)
- Philosophy, Modern--19th century (1)
- Philosophy, Modern--20th century (1)
- Philosophy--Introductions (1)
- Philosophy--Terminology (1)
- Physics--Philosophy--Addresses, essays, lectures (1)
- Pragmatics--Addresses, essays, lectures (1)
- Science--Addresses, essays, lectures (1)
- Science--Philosophy--Addresses, essays, lectures (1)
- Social problems--Addresses, essays, lectures (1)
- Social sciences--Addresses, essays, lectures (1)
- Thyssen, Johannes, 1892- (1)