other temperments

[A440A@AOL.COM]

Ric asks: 
>In ET the distance in M 3rds is always 13.7... add them all up and you
>get 178.1 cents. Why dont you get 178.1 cents when you add up the total 
differences
>for M 3rds in other temperaments ? Why does each temperament seem to have
>its own <Total cents differences>> for all the M 3rds in the octave ??

Hmm,   12 times 13.7 = 164.4
Werckmeister total    =  165
Kirnberger                 =   160   ETc..  

   The numbers on my chart are rounded off,  all of those 21 cents thirds are 
representing the syntonic comma, which is actually 21.5.  

    That make any more sense of it?  
Ed