DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.18826#0111
lect. ii.]
on perspective.
71
PLATE XXVIII.
Figure 1. Reprefents an inclined plane, one fide
of which is parallel to the pi&ure: erect on the
center a perpendicular at pleafure; and at H, form
fuch an angle as the plane to be treated is fuppofed
to make j as at K. Rule a line in that direction
from H, till it interfefts the perpendicular from C,
as at I: through I, rule a line parallel to H L, as
VI; which being the vaniming line to the plane,
governs its perfpective. To I (its center), rule D
and E j to C, the center of that part coincident
with the ground, rule DC; on a ere£t a line, which
cuts D I in A; from A, a line parallel to H L com-
pletes the figure: or A may be found by its proper
diagonal (being a fquare) ruled to V, its vaniming
point, as appears by the figure.
Figure 2 is a fimllar example, and the fquare
e d f g is found as fquares in general; VI being its
vanilhing line.
vol. in. Edit. 7. i PLATE
on perspective.
71
PLATE XXVIII.
Figure 1. Reprefents an inclined plane, one fide
of which is parallel to the pi&ure: erect on the
center a perpendicular at pleafure; and at H, form
fuch an angle as the plane to be treated is fuppofed
to make j as at K. Rule a line in that direction
from H, till it interfefts the perpendicular from C,
as at I: through I, rule a line parallel to H L, as
VI; which being the vaniming line to the plane,
governs its perfpective. To I (its center), rule D
and E j to C, the center of that part coincident
with the ground, rule DC; on a ere£t a line, which
cuts D I in A; from A, a line parallel to H L com-
pletes the figure: or A may be found by its proper
diagonal (being a fquare) ruled to V, its vaniming
point, as appears by the figure.
Figure 2 is a fimllar example, and the fquare
e d f g is found as fquares in general; VI being its
vanilhing line.
vol. in. Edit. 7. i PLATE