[1041] A very far-fetched explanation, and very wide of the mark.
[1042] “Paulum propulsa.”
[1043] Which he supposes a concave surface to do.
[1044] This passage is noticed by Beckmann, in his account of Mirrors; Vol. II. p. 58. Bohn’s Edition.
[1045] Distorting the image reflected, by reason of the irregularities of the surface. See Seneca, Nat. Quæst. B. i. c. 5.
[1046] “Parma Thræcidica.”
[1047] He probably means, whether the surface is made convex or concave at these different angles.
[1048] A subject to which he returns in various parts of B. [xxxv]i.
[1050] As to the identification of “stannum,” on which there have been great differences of opinion, see B. xxxiv. cc. [47], [48], and the Notes.