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This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

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| On the preservation of the senses, 1 book. | I think and I have thought. original: "Cogito & cogitavi." Bale. Pits. |
| On the prolongation of life, 1 book. | Bale. Pits. |
| The antidote-manual of human life, 1 book. | Leland. Bale. Pits. |
| The Greater Rogerina, 1 book. | Just as by the ancients. original: "Sicut ab antiquis." The "Rogerina" refers to Bacon's own medical compendiums, named after himself. Bale. Pits. |
| The Lesser Rogerina, 1 book. | Human nature. original: "Humana natura." Bale. Pits. |
| On sleep and waking, 2 books. | Bale. Pits. |
| Of Sermons or Addresses, 1 book. | Pits. |
| Commentaries on the Books of Sentences, 4 books. | Leland. Bale. Pits. The Books of Sentences by Peter Lombard was the standard textbook of theology in medieval universities; Bacon’s commentaries were his academic response to it. |
| On the Psalter. | Leland. This refers to a commentary on the Book of Psalms. |
| On the victory of Christ against the Antichrist. | I am no prophet. original: "Ne sum propheta." Leland. |
| A Compendium of Theological Study, 5 books. | Since, however. original: "Quoniam autem." Bale. Pits. |
| On the causes of abundance or scarcity. | Leland. Bale. Pits. |
| To Clement IV, Roman Pontiff, 1 book. | To the most holy Father. original: "Sanctissimo Patri." Pope Clement IV was Roger Bacon's primary patron, who encouraged him to write his major works in secret. Leland. Bale. Pits. |
| On the impediments to wisdom, 1 book. | Leland. Bale. Pits. |
| On the value of Music, 1 book. | Bale. Pits. |
| On intentional degrees, 1 book. | Every form. original: "Omnis forma." In medieval science, degrees referred to the intensity of qualities like heat or light. Pits. |
| On medicinal degrees, 1 book. | Leland. Bale. |
| On the q regions of the world, 1 book. | Bale. Pits. |
| On the causes of human ignorance, 1 book. | Bale. Pits. |
| On the utility of the sciences, 11 books. | Bale. Pits. |
| On the works of Virgil, several books. | Bale. Pits. |
q Perhaps regions. The original Latin text used "regibus" (kings), but the editor provides a gloss suggesting "regionibus" (regions) was the intended meaning.