Note 436 — BOOK II. AN ACCOUNT OF THE WORLD AND THE ELEMENTS. (continued 2)

Aristotle treats of the Rainbow much in detail, principally in his Meteor. iii. 2, 3, 4, and 5, where he gives an account of the phænomena, which is, for the most part, correct, and attempts to form a theory for them; see especially cap. 4. p. 577 et seq. In the treatise De Mundo he also refers to the same subject, and briefly sums up his doctrine with the following remark: “arcus est species segmenti solaris vel lunaris, edita in nube humida, et cava, et perpetua; quam velut in speculo intuemur, imagine relata in speciem circularis ambitûs.” cap. 4. p. 607. Seneca also treats very fully on the phænomena and theory of the Rainbow, in his Nat. Quæst. i. 3-8.