The theory of vision vindicated and explained / edited, with annotations, by H.V.H. Cowell.

  • Berkeley, George, 1685-1753.
Date:
1860
Catalogue details

Licence: Public Domain Mark

Credit: The theory of vision vindicated and explained / edited, with annotations, by H.V.H. Cowell. Source: Wellcome Collection.

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    XVI. JN order to treat with due exa&nefs on the nature of Vihon, it is neceffary in leave us in the dark.” On the Intellectual Powers, essay ii. chap. xvii. Stewart says :—“ I distinguish Extension and Figure by the title of Mathematical Affections of matter ; restricting the phrase Primary Qualities, to Hardness and Softness, Roughness and Smooth- ness, and other properties of the same description. The line which I would draw between Primary and Secondary Qualities is this, that the former necessarily involve the notion of Extension, and consequently of externality or outness; whereas the latter are only conceived as unknown causes of known sensations ; and when first apprehended by the mind, do not imply the existence of anything locally distinct from the subjects of its own consciousness.—Phil. Essays, Works; vol. v. pp. 116, 117. Brown has objected to these views, and thus sums up :—“ There is no reason to suppose that the knowledge is, in one case, more direct than in the other. In both, it is the effect of the presence of an external cause, and in both it must be relative only, to adopt Mr. Reid’s phrase, to that particular cause which produced