Perspective, a series of elementary lectures (1899)
Cone, Ada · New York, W.T. Comstock · leaf 51
45 PEKSPECTIVE. A circle appears as such only when the eye is oppo¬ site its centre. When the side only is seen it is a straight line. In all other positions it is an ellipse. As these other positions are practically unlimited, it oftenest appears as an ellipse. Fig. 21 shows circles in an upright… … Draw the nearest circle in the plane of measures, touching the G. L. Draw line A B from the cen¬ tre to the point of contact with the ground. This is the radius of the circle. Draw lines from A and B to the Y. P. A will pass through the centre of all circles which may be drawn beyond and B will…
Perspective · Drawing
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