DOI Page / Citation link:
https://doi.org/10.11588/diglit.62828#0154
they vifited Egypt, and faw thofe amazing ftru&ures, looked
on them as ftore-houfes for grain; and knowing Egypt to be
a country fruitful in corn, they called them Pyramids—corn
ftore buildings; being, as they thought, the repofitories for all
the produce of Egypt.”
No. 9, is a Cylinder. This is a folid, bounded by two
equal circles at its ends, and a parallelogram revolving round
their circumference. This figure is fitly reprefented by a gar-
den roller, whence its name KvXsvSpo^ kulendros, a roller; and as
for its conftrudtion, it is fo fimple that it is unneceffary to fay
any thing about it.
No. 12, is a Cone; a folid, bounded by two fuperficies, one
of which is convex, and the other firaight.
The bafe of a Cone is fometimes an ellipfis, and fometimes
a circle terminating to a point perpendicular to its center.
From this center to its vertical point, a line is fuppofed to pafs,
called its axis, on which this body might be made to revolve.
And the fame may be obferved of the Cylinder, Conoid, and
Sphere, each of which has its imaginary axis, or right line,
palling through its center, about which they may be made to
turn.
No.
on them as ftore-houfes for grain; and knowing Egypt to be
a country fruitful in corn, they called them Pyramids—corn
ftore buildings; being, as they thought, the repofitories for all
the produce of Egypt.”
No. 9, is a Cylinder. This is a folid, bounded by two
equal circles at its ends, and a parallelogram revolving round
their circumference. This figure is fitly reprefented by a gar-
den roller, whence its name KvXsvSpo^ kulendros, a roller; and as
for its conftrudtion, it is fo fimple that it is unneceffary to fay
any thing about it.
No. 12, is a Cone; a folid, bounded by two fuperficies, one
of which is convex, and the other firaight.
The bafe of a Cone is fometimes an ellipfis, and fometimes
a circle terminating to a point perpendicular to its center.
From this center to its vertical point, a line is fuppofed to pafs,
called its axis, on which this body might be made to revolve.
And the fame may be obferved of the Cylinder, Conoid, and
Sphere, each of which has its imaginary axis, or right line,
palling through its center, about which they may be made to
turn.
No.