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!!! NOTE !!! if the image(s) in the description shows a broken image icon(s), right click on the icon(s) and open in new tab to see the larger image(s). Perspective Another Fine Quality Print from Martin2001 Print Specifics: Type of print: Copperplate engraving - Original antique print Year of printing: 1816 Editor: G. Gregory, D.D. Engraver: --- Publisher: Issac Peirce, Philadelphia Condition: 1 (1. Excellent - 2. Very good - 3. Good - 4. Fair) Dimensions: 8 x 10.5 inches, including blank margins (borders) around the image. Paper weight: 2-3 (1. Thick - 2. Heavier - 3. Medium heavy - 4. Slightly heavier - 5. Thin) Reverse side: Blank Notes: Green color around the print in the photo is a contrasting background on which the print was photographed. 1 inch = 2,54 cm. Legend to the illustrations depicted in the print: PERSPECTIVE, is the art of drawing the picture or representation of any visible object on a plane surface, in such manner as it would appear on some transparent surface, interposed between an object and the eye of an observer. Hence it is the foundation of true painting, and is so far necessary in regulating the practical designs of an artist, that, without a knowledge of the principles thereof, he works at random, in not keeping to the nicety of measures and proportions. It has geometry for its foundation, and, consequently, truth for its support. It consists in determining and fixing the geometric situation of points in a picture, which points connected, produce lines, and lines (straight and curvilineal) constitute the first principles of a picture, the grand outline and structure which the painter is to dress with light and shade. Hence it is perceivable that the mathematician directs the outlines, but does not finish the piece; and, on the other hand, the painter cannot make asurc beginning without the mathematician's rules. Parallel perspective is where the picture is supposed to be so situated, as to be parallel to the side of the principal object in the picture, as a building for instance. Then the lines on those sides of the building that arc parallel to each other, continue parallel on the picture, and do not vanish into any point; while the lines at right angles to the former, vanish into the centre of the picture. This is exemplified in fig. 10. Oblique perspective, is when the plane of the picture is supposed to stand oblique to the sides of the objects represented, in which case the representations of the lines upon those sides will not be parallel among themselves, but will tend towards their vanishing point. This kind of perspective is shown in fig. 11. A row of arches is shown in fig. 14. The width of the archs and piers is obtained in the same manner as was shown in fig. 12, viz. by laying their dimensions upon the ground-line AB, and drawing lines to the distance-point. The curves of the arches arc then found by drawing the lines which correspond to those in half the square, fig. 13, in the same manner as described above for the circle. Ftg. 15 shows the appearance of circles drawn upon a cylinder, when HI is the horizontal line. Fig. 11 shows the method of drawing a building, or other object, in oblique perspective. AB is the horizontal line, and CD the ground-line, parallel to it as before. Here neither of the sides of the house is parallel to the picture, but each goes to its respective vanishing-point. Fig. 16 represents the method of finding the perspective of a circle in oblique perspective. Martin2001 Satisfaction Guaranteed Policy! Any print purchased from me may be returned for any (or no) reason for a full refund including all postage. seller since 1998. Five-star service. Powered by Turbo Lister The free listing tool. List your items fast and easy and manage your active items.