Cambridge, Trinity College MS. R.14.44. [CMA 496]. 97+18 folios. Paper. 209x149mm. 15th Century. 1. f1 A tract of temperatures. 2. f117 Speculum Alchemiae Rogeri Baconis. 3. f137 Rosary. This tretis shewith how ye shall gouverne your fire in all maner of operacions. f143 [Diagram.] 4. f151 [Various receipts and short tract in Latin.] 5. f1 Hic inc. Epistola transmissa ad papam per Mag. Arnaldum de Villanoua et est uerissima epistola. 6. f7v [Headed 'Bakon']. There is on thyngg alone to hom no strong thyng ys added. 7. f14v Alia Regula (in English). 8. f15v Semita recta. Albertus peribet testimonium.