The power of form applied to geometric tracery : one hundred designs and their foundations resulting from one diagram (1851)
Billings, Robert William, 1813-1874 · W. Blackwood and Sons · leaf 125
The radius of Nos. 1, 2, 3, is the diameter of the enclosing circle. XCVI. … The radius of 3, 3, is the diameter of the outer circle. of the same radius. Nos. 4, 5, are curves
Decoration and ornament · Geometry in art · Geometry in architecture · Architectural design · Form (aesthetics) · Geometrical drawing
Internet Archive · Clark Art Institute Library · Public Domain Mark 1.0. Free to use for anything.
