. Free-hand drawing : a manual for teachers and students. he sides, three vertical planes com-posed of the visual rays are formed. The vertical planes formedby the rays to the central line C intersect the eye in acurve, which, in the top view, Fig. 17, is represented by VCKThe vertical planes formed by the rays to the lines at the sides, inter-sect the eye in curves, which, in Fig. 17, are represented by thelines VB and VA, and it is evident that the intersections of thesethree planes with the eye, must be curves which tend to intersecteach other at two opposite points, represented in Fig. 17
. Free-hand drawing : a manual for teachers and students. he sides, three vertical planes com-posed of the visual rays are formed. The vertical planes formedby the rays to the central line C intersect the eye in acurve, which, in the top view, Fig. 17, is represented by VCKThe vertical planes formed by the rays to the lines at the sides, inter-sect the eye in curves, which, in Fig. 17, are represented by thelines VB and VA, and it is evident that the intersections of thesethree planes with the eye, must be curves which tend to intersecteach other at two opposite points, represented in Fig. 17 by /^ onebeing at the top of the eye and the other at the bottom. It is, how-ever, not of the slightestconsequence whetherstraight lines appearcurved or not, for if the ^artist draws the differentparts of the same straightlines, or of parallel straight ?lines as he sees them, thedrawing resulting will givethe effect of is illustrated by ,2), which reproduces themain lines of a publisheddrawing by an artist whodrew just what he saw,. Fig. 33. Incorrect Drawing. without considering the effect thus produced, or the perspective principles which the artist mustunderstand and apply. This drawing is similar in its errors to thosewhich may often be found in the illustrations of our books andpapers. These errors are due to the fact that the visual angles, in asubject causing large visual angles, are measured on so large a part ofthe surface of a sphere, that they cannot be approximately representedon the surface of a plane. In other words, we see in a sphere and 98 FREE-HAND DRAWING. draw on a plane; and, as the surface of the sphere cannot be devel-oped, we cannot represent the different objects included in a subjectcausing large visual angles, so that the actual appearance of eachobject shall be given, and also the relations of the objects to eachother. In the work of the artist, then, the least important must giveway to the more important. To the pupil and the tea
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Keywords: ., bookauthorcr, bookcentury1800, bookdecade1890, booksubjectdrawing
