A book about mathematical drawing on the blackboard Several years ago, when I was just starting undergrad, I ran across an instructional text on chalking beautiful mathematical diagrams while killing time in the college library. In my infinite wisdom, I decided that I should remember this book's name, and find it again whenever I had the time to go through it.
A few weeks back, I finally thought about it again, but this event apparently preceded my book list—I've forgotten everything except its existence.
Is anyone aware of anything that might be it? The only other things I remember are some very nice fold-out illustrations and that it was at the tail end of the QAs, close to the astronomy and physics collections.
 A: Georges K. Francis, A topological picturebook
An excerpt from the color plates. 
A: This may or may not be the particular book you remember, but even if it's not, it may align with your interest:
Do Not Erase: Mathematicians and Their Chalkboards

“A mathematician, like a painter or poet, is a maker of patterns,”
wrote the British mathematician G. H. Hardy. In Do Not Erase,
photographer Jessica Wynne presents remarkable examples of this idea
through images of mathematicians’ chalkboards. While other fields have
replaced chalkboards with whiteboards and digital presentations,
mathematicians remain loyal to chalk for puzzling out their ideas and
communicating their research. Wynne offers more than one hundred
stunning photographs of these chalkboards, gathered from a diverse
group of mathematicians around the world. The photographs are
accompanied by essays from each mathematician, reflecting on their
work and processes. Together, pictures and words provide an
illuminating meditation on the unique relationships among mathematics,
art, and creativity.


