Paris:--Mazarine 3576, _De coelestibus_ (five chapters). _Inc._ ‘Prima igitur veritas.’ (3) _Gravity_, _Scientia ponderum de gravibus et levibus_. Cf. _Tractatus trium verborum_. Liber iii. (4) _Alchemy_, or, _De elementis_[1354]. Liber iv. _De vegetabilibus et generabilibus_[1355]. (5) _Agriculture._ See note in Brewer, _Opera Ined._ p. li. (6) _Medicine._ (7) _Experimental Science._ Vol. IV. _Metaphysics and Morals._ _Inc._ ‘Quoniam intencio principalis est innuere nobis vicia studii theologici que contracta sunt ex curiositate philosophie.’ MSS. Bodl.: Digby 190, fol. 86 b (sec. xiii-xiv). ‘Methaphisica fratris Rogeri ordinis Fratrum Minorum, de viciis contractis in studio theologie’ (25 lines). Paris:--Bibl. Nat. 7440 (sec. xiv), fol. 38-40, fol. 25-32. ‘Incipit metaphysica Rogeri Baconis de ordine praedicatorum’ (fragment). It is, however, probable that these MS. fragments ought to be referred to Bacon’s last work, the _Compendium Studii Theologiae_, rather than to the _Compendium Philosophiae_. _Compendium studii theologiae_, Bacon’s last work, bears the date 1292 (‘usque ad hunc annum Domini 1292’). Extracts from it are printed by Charles, pp. 410-416. This work consisted of six parts or more. Part i. _On the causes of error._ Part ii. _Logic and grammar in reference to theology._ These two parts are extant (though not complete) in MS. British Museum, Royal F vii. pp. 153-161: there is a long gap between pp. 154 and 155. According to this MS. the work consisted of two parts: ‘Incipit compendium studii theologiae et per consequens philosophiae ut potest et debet servire theologicae facultati, et habet duas partes principales; prima liberali communicatione sapientiae investigat omnes causas errorum, et modos errandi in hoc studio.... Secunda pars descendit ad veritates stabiliendas et ad errores cum diligentia exterminandos.’ Part v. is preserved in Royal MS. 7 F. viii. f. 2 (sec. xiii) (almost complete); it is a treatise on _optics_. _Incipit_: ‘Acto prologo istius quintae partis hujus voluminis quam voco compendium studii theologiae, in quo quidem comprehendo in summa intentionem totius operis, extra partem ejus signans omnia impedimenta totius studii et remedia, nunc accedo ad tractatum exponens ea quae necessaria sunt theologiae de perspectiva et de visu.’ Part vi. is mentioned in Part v.: it is to be a treatise, ‘_De multiplicatione Specierum_.’ In Part iv. also the words ‘_in partibus sequentibus_’ occur.