. Free-hand drawing : a manual for teachers and students. picture on a plane at right angles to the direction in which an:object is seen which will not when viewed naturally, produce asatisfactory impression of the object. Fig. 25 is from a photograph of a vertical square prism below theeye, the picture plane (the negative) being at right angles to thedirection in which the prism was seen as illustrated by the side 26. The side view shows that the lower ends of the verticaledges are farther from the eye than the upper ends; these verticaledges must then appear to converge downwards,


. Free-hand drawing : a manual for teachers and students. picture on a plane at right angles to the direction in which an:object is seen which will not when viewed naturally, produce asatisfactory impression of the object. Fig. 25 is from a photograph of a vertical square prism below theeye, the picture plane (the negative) being at right angles to thedirection in which the prism was seen as illustrated by the side 26. The side view shows that the lower ends of the verticaledges are farther from the eye than the upper ends; these verticaledges must then appear to converge downwards, just as Fig. 25represents them. Fig. 25 is a plane perspective upon an inclinedpicture plane instead of a vertical plane. When the eye is at thestation-point, which for Fig. 25 is about 4^ from the paper, andin a perpendicular to the page erected at the centre of the draw-ing, and when the drawing is inclined, as shown in Fig. 26, its lineswill exactly cover the edges of the object, and will, of course, cause SCIENTIFIC PERSPECTIVE AND MODEL DRAWING. 91. K .:


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Keywords: ., bookauthorcr, bookcentury1800, bookdecade1890, booksubjectdrawing