16viiiThe PREFACE.
ſtill difficulter:
Whence we are obliged to
give particular Methods for the Reſolution of
theſe two Problems.
give particular Methods for the Reſolution of
theſe two Problems.
The reſt of the Third Chapter is concern-
ing Inclin’d Lines, and how to find their Ap-
pearance by the Accidental Point.
ing Inclin’d Lines, and how to find their Ap-
pearance by the Accidental Point.
The Fourth Chapter ſhews the Manner of
working on a perſpective Plane, to be view’d
afar off, very obliquely, or which muſt ſtand
in an high Place. Theſe different Situations
require new Rules: For if the common Me-
thods were to be uſed here, the perſpective
Plane muſt be ſo large, as that it would be
impoſſible to work upon it.
working on a perſpective Plane, to be view’d
afar off, very obliquely, or which muſt ſtand
in an high Place. Theſe different Situations
require new Rules: For if the common Me-
thods were to be uſed here, the perſpective
Plane muſt be ſo large, as that it would be
impoſſible to work upon it.
In the Two following Chapters, we treat
of the perſpective Plane, conſider’d as Hori-
zontal, or Inclin’d: Where there are laid
down ſeveral general Ways of working;
which, together with thoſe of the foregoing
Chapters, will ſuffice (in my Opinion) for
throwing any Object whatſoever into Perſpe-
ctive, with Eaſe enough.
of the perſpective Plane, conſider’d as Hori-
zontal, or Inclin’d: Where there are laid
down ſeveral general Ways of working;
which, together with thoſe of the foregoing
Chapters, will ſuffice (in my Opinion) for
throwing any Object whatſoever into Perſpe-
ctive, with Eaſe enough.