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TO

The Lovers of Perpective.

HE Art of PERSPECTIVE does, with wonderful Pleaure, deceive the Eye, the mot ubtle of all our outward Senes; and is very neceary to be known of all, who in Painting would give a due Place and Proportion to their Figures, and more or les Strength requiite to the Lights and Shades of the Picture. This might be inenibly attain'd, if Perons, not content with the Study of Drawing only, would accutom themelves exactly to delineate the everal Orders of Architecture. Nevertheles, among many who have hitherto vigorouly undertaken this Work, there have been but very few, who have not been in a manner quite dicourag'd, thro' want of Mailers and Books to teach them clearly and methodically the Rules of Perpective-Projections, from the firt Principles of the Art, to the entire Perfection thereof. Wherefore, apprehending that by long and contant Practice in Works of this kind, I had acquir'd a Method to facilitate the ame; I judg'd it might be for the Satisfaction and Advantage of the Studious, to publih the fhorteft Way for defigning in Perpective the everal Orders of Architecture, by a common and eay Rule, free from the Incumbrances of occult Lines. But if it pleae God to give me Life and Health to compoe another Book, I hall then hew the Method of putting Works into Perpective by the Rule I make ue of at preent, which is more eay and general than the common way, tho this be the Foundation of the other. Therefore, Reader, my Advice is, that you chearfully begin your Work, with a Reolution to draw all the Points thereof to that true Point, the Glory of GOD; and I durt predict, and promie you good Succes in o honourable an Undertaking.