The Elements of Perspective / arranged for the use of schools and intended to be read in connection with the first three books of Euclid

by John Ruskin

c d

.

These two semicircles are the upper and lower edges of the fillet.

Then diagonals and diameters are drawn as in [Fig. 68.], and, at their extremities, semicircles in perspective, as in [Fig. 69].

The letters A, B, C, D, and E, indicate the upper and exterior angles of the rectangles in which these semicircles are to be drawn; but the inner vertical line is not dotted in the rectangle at C, as it would have confused itself with other lines.

Then the visible contour of the fillet is the line which incloses and touches[Footnote 33] ] all the semicircles. It disappears behind the shaft at the point H, but I have drawn it through to the opposite extremity of the diameter at

d

.

Turned upside down the figure shows the construction of a basic fillet.

The capital of a Greek Doric pillar should be drawn frequently for exercise on this fourteenth problem, the curve of its echinus being exquisitely subtle, while the general contour is simple.