Forms of Circles

Some further exploration of the various shapes made out of circles, including the golden section and related forms. The second sheet (ripped from the sketchbook!) were attempts at making more structural forms in this same manner.

Hypothetical Bridges

Whipped these up on the train today. I had this idea for a spiral/ribbon bridge... then it turned into a helix bridge... then it turned into a sectional bridge based on undulating circular tunnels... then I got to my station and had to put the pen down. They aren't fully hashed out, but just some initial thoughts that could potentially be worked out later... or on my next train ride!