[20] In the same paragraph, when speaking of black bodies becoming hot, and burning sooner than others, he says that their “effect may proceed partly from the multitude of refractions in a little room and partly from the easy commotion of so very small corpuscles.”—Optics, Part iii. Prop. vii. p. 235.
[21] See page 354.
[22] When Newton speaks of bodies losing their reflecting power from their thinness he means the reflecting power of their second surfaces, as is evident from the reason he assigns.—See Optics, Part iii. Prop. xiii. p. 257.
[23] Edinburgh Journal of Science, No. 1. p. 108.
[24] See the Phil. Trans. 1829, Part I. p. 189.
[25] Idem.
[26] Phil. Trans. 1819, p. 11.
[27] If this view of the matter be just, we should expect that the specific gravity of the black would exceed that of the yellow phosphorus.
[28] Since the two preceding chapters were written, I have had occasion to confirm and extend the views which they contain by many new experiments.
[29] Physico-Mathesis de Lumine coloribus et iride aliisque annexis. Bonon. 1665.