81-pitch lattice of Johnston's _Sonata for Microtonal Piano_

I'm going to give the Scala-type lattice for the 81-pitch set used in
Ben Johnston's _Sonata for Microtonal Piano_. Johnston only used
seven octave-equivalent pairs in retuning the 88 keys of the piano.

Note: use a proportional font, such as Courier. Contrary to usual
practice, I'll use Johnston's lattice directions: horizontal (>) =
5:4, vertical (^) = 3:2.

*
* * * *
* * * * * *
* * * * * *
* * * * * *
* * * * * *
* * * * * * *
* * * * * * * *
* * * 0 * * * *
* * * * * * * *
* * * * *
* * * *
* * * *
* * * *
* * * *

This, and almost anything else you would want to know about this
piece, can be found in

Gibbens, John Jeffrey. _Design in Ben Johnston's _Sonata for
Microtonal Piano_ _. Interface, Vol. 18 (1989), pp. 161-194.