The
FunJiimcntal Vate-Forins.
301
or less
direct
imitation;
.and were undoubtedly used
by
mankind
in
the
lowest
stages
of civilisation, instead of
artificial
vessels.
Certain
stereotyped
forms
recur again and again: first among tbem
(due to the
use of
the potter's
wheel)
the form of the
so-called body
of revolution.
An
attempt
is made,
on Plate
181,
to
give a general view
of
the
com-
monest
fundamental
forms, with their
names.
The Sphere,
the Cylinder,
and
the
Hyperboloid,
are
the
simplest of these.
The
Sphere
is
altered,
by
equally
flattening
or extending,
to the
Spheroid,
or
the Ellipsoid.
If these
bodies
bo cut-away
at
both
ends: we
have the erect, and the
recumbent
vessel. Unequal
flattening and
extending
produce
forms
which
wo
may term
Echinus,
Cake, Egg,
and Top forms; or, if the
length
much
exceeds the
breadth:
Wedge, Spindle, and Drop forms.
If only
the top
be cut-into:
we
have either
the Dish,
or
the
Cup
form.
Conical,
Bag, and
Canopus
forms may
be
derived from the
Cylinder.
In
a
similar way
the Hyperboloid
also leads
to
new forms.
If the height
of
the vessel
be a high
multiple of the
diameter,
we
get slender,
tapering
forms: in the reverse case, we
have dishes and
plates.
The
Egg
is the commonest form in
Pottery. Cylindrical
and
Conical
forms,
i.
e.
such
bodies as have
a
developible surface,
are
best adapted for
Sheet-
metal work.
Mathematical
curves, e.
g.
arcs
of circles, are not strictly ad-
hered-to in
'the profiles. Vessels, which are not made on the wheel,
often exhibit
arbitrary forms which
cannot be
grouped
in
the scheme'
of the
Plate. In the Chinese and
Japanese
styles,
for
example,
pris-
matic forms
are very common (compare Plate
187.
1);
human and
animal shapes
are found in the Antique,
as forms of
vessels, (com-
pare Plate
194.
12).
The Various
junctions,
of the Body
with the Neck, or the
Foot,
will produce
a
series of new forms. The use
of Double-curvature
in
the profile will
also produce new forms, the
simplest of which are the
Bell,
and the
Pear. The so-called "Gourd-pots",
the Pilgrim-
bottles,
&c.,
also form
special and rarer
groups
of forms. Here too,
may
be
mentioned
duplex
vessels
formed
by the
juxtaposition
of two
vessels on
a
common
foot,
or by
uniting
them
with
a common
handle. These
forms are found
sporadically in Prehistoric
and all subsequent periods.
As
regards
the Feet
of vessels:
we
have first to
remark that
in
the earliest times footless and three-footed vessels are by no
means
rare.
The former
were
sunk in the earth,
the
latter
would stand on
an
uneven surface.
The
usual form of foot presupposes a
level stand-
ing surface
and therefore some degree of civilisation.
Intermediate,
between
the absence
of
a
foot and the high foot, is
the Ring-foot, a