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 17
14 … In its second form, by thelines cutting through thesepoints on the circumference ofthe circle, and passing throughits centre, we have the skeletonof our diagram, thus :— The third form is the perfectedfigure upon which our designsare produced. It is simply theintroduction into the previousfigure of…
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.
![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-266-171.webp)
