Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 728
f Y Fig. 1792. Fig.1793. The sides of the pavement, being perpendicular to the perspective plane, aretheir own perpendiculars. Thus S a and S l are their perspectives. The lines ofdivision of the blocks, being at 45°, are their own diagonals and vanish at D and D^. To find the Perspective of a Cube…
Mechanical drawing
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