Edition of 30 issued in case; numbered and signed by the artist.
"In geometry, the inscribed sphere or insphere of a convex polyhedron is a sphere that is contained within the polyhedron and tangent to each of the polyhedron's faces."
"Helen Hiebert created all of the papers in this book using 100% cotton rag fiber: the cover and end sheets feature a pulp stenciling technique; the rest of the pages are double-sided. The text was printed by Tom Leech at the Press at the Palace of the Governors in Santa Fe, New Mexico from polymer plates made by Boxcar Press. The typeface is Dante. The geometric shapes were hand cut and scored. All stitching was done by hand. Claudia Cohen bound and boxed the book. Tangential was designed and produced at Helen Hiebert Studio in Red Cliff, Colorado"--Colophon.