A Treatise on the Curvilinear Perspective of Nature and Its Applicability to Art

altitude appearances of nature artist ascer ascertained building centre circumference cognizant vision convexity cornea curvilinear perspective demonstrated dictate the perspective distortion drawing drawn evidence figure fixed front view give given relative proportion ground-plan horizontal line houses intersecting point laws limit of vision line passing linear perspective lines of nature lines parallel look magnitude Malton nearest object obtain optic nerve parallel planes passing the eye perfect vision perspective depth perspective inclination perspective of nature picture plane passing planes and lines plinth and abacus portion principle of vision principles of rectilinear produce radius recede rectilinear perspective refraction retina right line right-lined perspective seen sensorium shew shewn space spectator station and distance straight line strata surface terminate THEOREM theory tion towers transparent plane truth vanishing plane vanishing points vanishing-line vertical lines visible vision is cast visual rays vitreous humour