DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.18826#0112
78
on
perspective.
[lect. ii,
PLATE XXIX.
No. I. Is an application of the foregoing prin«
ciples to a natural object, and reprefents a flight of
Hairs in perfpective : C is the center of the horizon-
tal line; O is the angle made by the afcent of the
ftairs j and gives V for the tranfpofed center, to
which the inclined lines are ruled. The meafures
of the flairs are feton the ground line, as at 1 2, and
3 4. The fhadow of the rail D is found by taking
A B as a ray, to which all fhadows that fall on the
uprights of the flairs are parallel; thofe which fall on
the horizontal parts of the flairs follow their direction
and vanifh in C,
PLATE
on
perspective.
[lect. ii,
PLATE XXIX.
No. I. Is an application of the foregoing prin«
ciples to a natural object, and reprefents a flight of
Hairs in perfpective : C is the center of the horizon-
tal line; O is the angle made by the afcent of the
ftairs j and gives V for the tranfpofed center, to
which the inclined lines are ruled. The meafures
of the flairs are feton the ground line, as at 1 2, and
3 4. The fhadow of the rail D is found by taking
A B as a ray, to which all fhadows that fall on the
uprights of the flairs are parallel; thofe which fall on
the horizontal parts of the flairs follow their direction
and vanifh in C,
PLATE