[18] Treatise on Optics, p. 171; see also sect. 64, p. 113.
[19] Treatise on the Eye, vol i. p. 412, Plate 5, Fig. 37.
[20] As Mr. Wheatstone himself describes the dissimilar pictures or drawings as “two different projections of the same object seen from two points of sight, the distance between which is equal to the interval between the eyes of the observer,” it is inconceivable on what ground he could imagine himself to be the discoverer of so palpable and notorious a fact as that the pictures of a body seen by two eyes—two points of sight, must be dissimilar.
[21] Phil. Trans., 1838, pp. 371-394.
[22] Phil. Trans., 1838, pp. 391, 392.
[23] December 28, 1550.
[24] “Le fait est,” says the Abbé Moigno, “que le stéréoscope par réflexion était presque complètement oublié, lorsque Sir David Brewster construisit son stéréoscope par refraction que nous allons décrire.”—Cosmos, vol. i. p. 4, 1852.
[25] Phil. Trans., 1852, p. 6.
[26] Ibid., pp. 9, 10.
[27] Vol. v. livre viii. p. 241.