The Repreſentation of two Points of theſe
Figures muſt be firſt found ; and then by 1124. of theſe two Points the Appearances of others
may be had .
2238.Figures muſt be firſt found ; and then by 1124. of theſe two Points the Appearances of others
may be had .
Let A B C D E, be a Pentagon, whoſe Ap-
33Fig. 40. pearance is requir’d; V the Point of Sight; and
V F the ſixth Part of the Eye’s Diſtance from
the perſpective Plane. Now find b and e 4424. Appearance of B and E, by means of which,
the Appearance of the Point A will be had . 5538. In like Manner, by means of the Repreſenta-
tion of A and E, will that of D be had; and
by uſing B and A, the Perſpective of C may be
found.
33Fig. 40. pearance is requir’d; V the Point of Sight; and
V F the ſixth Part of the Eye’s Diſtance from
the perſpective Plane. Now find b and e 4424. Appearance of B and E, by means of which,
the Appearance of the Point A will be had . 5538. In like Manner, by means of the Repreſenta-
tion of A and E, will that of D be had; and
by uſing B and A, the Perſpective of C may be
found.
Problem II.
77.
To throw Figures, which are in the Geometri-
cal Plane into Perſpective, when the Eye is ſo oblique
that it cannot be marked in the Horizontal Plane,
or the Point of Sight in the Horizontal Line.
cal Plane into Perſpective, when the Eye is ſo oblique
that it cannot be marked in the Horizontal Plane,
or the Point of Sight in the Horizontal Line.