This rotationally symmetric object is similar to a trefoil knot.
The underlying grid was kept for accurate GeoGebra rendition.
(It was created, then rotated pi/6 to be faithful to the original, so the
isometric grid lines do not match up with the diagram.)
“These geometric studies, dated to 1896, were originally educational plates
designed to explain the role of geometry in science. The beauty of these images
lies in their simple yet sophisticated feel. The pieces are deckled and floated
on linen, then framed in acrylic and embellished with a leather strap.”
source credit: http://naturalcuriosities.com/node/116
from wikipedia: Jean-Baptiste Biot (1774–1862) was a French physicist, astronomer,
and mathematician who established the reality of meteorites, made an early balloon
flight, and studied the polarization of light. Biot also discovered the mineral biotite.
credits:
http://www.edudemic.com/check-out-jean-baptiste-biots-puzzilingly-beautiful-geometric-art/
http://en.wikipedia.org/wiki/Trefoil_knot
