That's what I was missing, thanks !In Newton's scale the 9/8's and 10/9's are two different sizes of whole tone and the 16/15 is his semitone.
To correct (whoopsie !) my example of palindromic scale, and in order to make clearer the way it was built:
C-Db-D-Eb-E-F-Gb-G-Ab-A-Bb-B-C
C-Db-D-Eb-E-F-Gb-G-Ab-A-Bb-B-C
C-Db-D-Eb-E-F-Gb-G-Ab-A-Bb-B-C
C-Db-D-Eb-E-F-Gb-G-Ab-A-Bb-B-C
C-Db-D-Eb-E-F-Gb-G-Ab-A-Bb-B-C
which only makes for 5 palindromic scales...
