| Class | Subject | Items | Liaison |
| B1-785 | Philosophy, General through pre-Modern | 3,796 | Ryan Clement |
| B790-2499 | Philosophy, Modern, chiefly French | 4,434 | Ryan Clement |
| B2500-end | Philosophy, Modern, chiefly German | 4,435 | Ryan Clement |
| BC | Logic | 558 | Ryan Clement |
| BD | Speculative philosophy | 2,058 | Ryan Clement |
| BF | Psychology, parapsychology, occult sciences | 985 | Carrie M. Macfarlane |
| BH | Aesthetics | 601 | Ryan Clement |
| BJ | Ethics | 1,893 | Ryan Clement |
| BL | Religions, mythology, rationalism | 5,135 | Rebekah Irwin |
| BM | Judaism | 1,885 | Rebekah Irwin |
| BP | Islam, Bahaism, Theosophy, etc. | 1,890 | Rebekah Irwin |
| BQ | Buddhism | 2,500 | Rebekah Irwin |
| BR | Christianity | 3,622 | Rebekah Irwin |
| BS | The Bible | 2,926 | Rebekah Irwin |
| BT | Doctrinal theology | 2,325 | Rebekah Irwin |
| BV | Practical theology | 1,440 | Rebekah Irwin |
| BX | Christian denominations | 4,905 | Rebekah Irwin |