An Essay towards a new Theory of Vision

abstract angle answer appearance applied attend blind body called cause circumstances clear colours common conceive concerning confused connected connexion consequence consider demonstrated determinate difficulty distance distinct divergency doth earth entirely equal erect evident exist experience extension faintness fall farther feet figure follows geometry greater greater or lesser hath head Hence ideas ideas of sight immediate objects inverted judge judgment language less light look lower magnitude manner marked matter means mind motion nature nearer nearest necessary never nevertheless objects of sight observed opinion optics otherwise painted particular perceived by sight perception perhaps placed plain planes proper rays reason relation represent respect sect seems seen sense shown sight and touch signify situation solids sort sound square suggest suppose tangible tangible figure things thoughts touch true truth understanding visible visible extension visible figure vision wherein whereof