PRELIMINARY DISCOURSE Upon Painting &c. FTER having fpoken of theSculpture and Architecture of theAncients ; after having endeavou* red to shew the road , they tookto carry thofe Arts to that degreeof perfection , of which they feemedfufceptible ; after having attemptedto indicate thofe maxims… … I Mime Art , which , with Wri- ting and Navigation ought to he confidered as one of the mojl fplen- did