MSS. British Museum: Sloane 2156, f. 74-97 (sec. xv), ending in the second part of the first book.
Bodl.: Digby 76, fol. 48 (sec. xiii), containing the remainder of the first book (?). Inc. ‘Mathematica utitur tantum parte.’
Libri ii-vi. An extant fragment of a commentary on Euclid by Bacon may have belonged to this part; in De Coelestibus (Comp. Phil. vol. iii.) he often refers to his commentary on the Elements of Euclid (Charles, p. 85).
MS. Digby 76, f. 77-8 (sec. xiii).
A treatise, De laudibus mathematicae, expressing the same ideas as Part iv. of the Opus Majus, may have been intended as an introduction to this volume.
MS. Royal 7 F vii. fol. 141-152: cf. Digby 218, f. 98.
Vol. III. Physics. First came general physics (1 book), then particular sciences (3 books).
Liber i. Communia Naturalium, divided into 4 parts.
MSS. Brit. Mus.: Royal 7 F vii. f. 84 (sec. xiii), Liber Naturalium. ‘Hoc est volumen naturalis philosophiae in quo traditur scientia rerum naturalium, secundum potestatem octo scientiarum naturalium quae enumerantur in secundo capitulo; et habet hoc volumen quatuor libros principales, Primum scilicet De communibus ad omnia naturalia; secundum De Coelestibus; tertium De Elementis, mixtis, inanimatis; quartum De vegetabilibus et generabilibus.’ (This MS. ends at the third part of the first book).
Bodl.: Digby 70 (sec. xiv). Communia Naturalium. Inc. ‘Postquam tradidi grammaticam’ [Desinit ad init. cap. vii].