Draw a Parallel A B, through the Point A,
to the Baſe Line, meeting the Line C D in the
Point B, and let a ſecond Eye be ſuppoſed at
the ſame Height and Diſtance as the firſt; then
find F G the Repreſentation of A B for 1142. ſecond Eye, which continue until it meets the
Line C E in b, and in this Continuation aſſume
b a equal to F G; then a will be the Perſpective
ſought.
to the Baſe Line, meeting the Line C D in the
Point B, and let a ſecond Eye be ſuppoſed at
the ſame Height and Diſtance as the firſt; then
find F G the Repreſentation of A B for 1142. ſecond Eye, which continue until it meets the
Line C E in b, and in this Continuation aſſume
b a equal to F G; then a will be the Perſpective
ſought.
Becauſe the Height and Diſtance of the ſecond
Eye, is equal to the Height and Diſtance of the
firſt; the ſaid two Eyes are both in one parallel
Line A B; and conſequently , the 2218. of A B muſt be a Part of F G continued, and
3312. alſo equal to F G: And therefore becauſe the Perſpective of B is in the Line C E, a b is the
4416. Perſpective of A B; and a , that of A. Which was to be demonſtrated.
Eye, is equal to the Height and Diſtance of the
firſt; the ſaid two Eyes are both in one parallel
Line A B; and conſequently , the 2218. of A B muſt be a Part of F G continued, and
3312. alſo equal to F G: And therefore becauſe the Perſpective of B is in the Line C E, a b is the
4416. Perſpective of A B; and a , that of A. Which was to be demonſtrated.