Perspective, or, The art of drawing what one sees : explained and adapted to the use of those sketching from nature (1872)
Collins, W. H. (William Henry) · London : Longmans, Green · leaf 68
50 PEESPECTIVE DKAWING. line A B miglit have been assumed as the length of a table or mantelpiece of which we required the centre. Take any point p at random on the line H R immediately above A b. From a draw a line Fig. 22. … A F ED A D parallel to h r, or to the bottom of the paper. Draw p B, and produce it until it cuts A d in e; bisect A E in f, and join p f ; where tliis line cuts A B — viz. o, is the centre. If it were required to add a piece on to a line of equal length to itself, this construction shows us how it…
Perspective · Drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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