Generator
The next organ moves for the last 13, and for no others
One row per organ removed, counted back from the tip of a stem at a rise of 0.005 whose counted pair is 8 and 13. Removing any of the last 13 moves the next organ by 2.6° to 167.6°; removing an older one moves it by at most 0.47°, which is under the azimuth grid. The boundary is at 13, and 13 is the larger parastichy number — so the experiment counts the spirals without measuring an angle.
Drawn at its defaults, in take an organ away, and watch.
It carries a slider over rise, so the claim in its caption strip is
restated at every stop rather than at one.
It takes no options at all, so every essay calling it gets this exact drawing.
Called by 13 essays
the blast radius of changing it
What a plant might be doing