Nicholson, Peter: The student's instructor in drawing and working the five orders of architecture (London, 1823)

27

OF THE IONIC ORDER.

PLATE XXII.

Shews the front, side, and plan of the Roman Ionic
capital. The whole height of the volute is twenty-
eight minutes., the centre of the volute is sixteen
minutes from the top side of the list; and is de-
scribed as in Plate XXVIII.; the bead, or upper
part of the astragal is equal in thickness and in
height, to the eye of the volute; the height of the
ovolo above, is from the upper side of the eye, -to
the upper side of the list in the second revolution;
the projection of the cincture, or hollow under the
fillet of the astragal, is equal to the height of the
fillet; and the projection of the bead is a semicircle;
for the ovolo, the quarter of a circle, whose projec-
tion is from the perpendicular line of the fillet. The
dotted line upon the volute, is a section through the
side at A B; or through the plan at C D ; the orna-
mental part is drawn by hand.

PLATE XXIII.

The front and plan of the angular Ionic capital;
the plan is inverted, that the mouldings underneath
the abacus may be seen; the volutes in front are
drawn according to Plate XXIX.; this- sort of capi-
tal has an advantage over the others, it fronts each
of its sides alike; which is not the case with the