Demonstration

we sat the morning in the kitchen of Cox's farm watching a brown spider

do the engineering she knew best to swing the space

from plate rail to the window jamb

and back again and back again

and pull the spokes from hub to rim

and back again and back again

to make a trap of angles span the moving air

at the open window peak then at the meeting of the angles

clockwise wind a widening circle to the edge

you asked if she knew geometry and had she watched the several flyways in her corner of the room and chosen this one on evidence