P. 1. The Optics of Ptolemy in the Latin translation from the Arabic-the Greek text being lost-made by the Sicilian Admiral Eugenius, originally in 5 books, of which the first was not found. beg. 'Cum considerarem Optica Tholomaei ...' (p. 1). P. 3. Text beg. 'Omnia quidem, quibus aliquis possit coaptare ea'. This MS. is no. 4 in L'Ottica di Claudio Tolomeo, edited by G. Govi (Turin, 1885): (p. 139) 'Jacobi Alkit de causis diversitatis aspectuum liber',…