Elementary linear perspective of form and shadow ... Complete in itself ... For draftsmen, artists, and industrial drawing courses in preparatory and high schools, etc. In two parts.. (1891)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 69
taken also as the perspective plane. ing objects shall have been found, the two following problems may be omitted at thediscretion of the teacher. * This method being chiefly valuable as an intellectual exercise in the conceptionof positions and motions in space, it may be omitted at the discretion… … ye 1/ Fig. 32. from the sphere, to which two tangent visual rays may be drawnThe points of tangency of these visual rays will, as such, be pointsof the apparent contour of the sphere. But to show these rays, theplane E05 must be revolved to a position parallel to one of theplanes of projection. Let…
Perspective · Mechanical drawing
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