Note 2 — PART VI. (continued 2)
Charles Lock Eastlake translation
"De Ignib. cœlest." The description of the prism by Seneca is another instance of the truth of Castel's admission. The Roman philosopher's words are—"Virgula solet fieri vitrea, stricta vel pluribus angulis in modo clavæ tortuosæ; hæc si ex transverso solem accipit colorem talem qualis in arcu videri solet, reddit," &c.