. Free-hand drawing : a manual for teachers and students. Fig. rS. Perspective of a Sphere. From Photograph. vertical. The picture of the sphere is seen to be a vertical ellipse,and it does not create a satisfactory impression of the round 19 is a side view representing the sphere, the eye, and avertical picture plane touching the sphere. The visual rays fromthe sphere to the eye form a cone, and Fig. 19 shows that this coneof rays is intersected obliquely by the vertical picture plane. Thecone is a circular cone, — that is, if it is cut by a plane at rightangles to its axis the se
. Free-hand drawing : a manual for teachers and students. Fig. rS. Perspective of a Sphere. From Photograph. vertical. The picture of the sphere is seen to be a vertical ellipse,and it does not create a satisfactory impression of the round 19 is a side view representing the sphere, the eye, and avertical picture plane touching the sphere. The visual rays fromthe sphere to the eye form a cone, and Fig. 19 shows that this coneof rays is intersected obliquely by the vertical picture plane. Thecone is a circular cone, — that is, if it is cut by a plane at rightangles to its axis the sections will be a circle ; and by geometry we 84 FREE-HAND Position • of- the ? Pic tor? • PUne ? wkicK ^luej ? i. •distortecj • pictbr?-.,of- tie • SpKere.
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Photo credit: © The Reading Room / Alamy / Afripics
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Keywords: ., bookauthorcr, bookcentury1800, bookdecade1890, booksubjectdrawing
