Contiguous Major Thirds Accuracy?

[Thomas Cole]

Paul,

The only difficulty I have with contiguous major thirds is that the last 
one in the series you present below is a diminished fourth! Now *D-flat* 
to F4 would work :-]

Tom (musically)

paulrevenkojones at aol.com wrote:
> David (Boyce)...
>
> Just a word on the contiguous 3rd's and their accuracy. However you 
> start, from F3 to A, A to C#, C# to F4, e.g., none of the first 
> settings of these pitches is precise, absolute, or unmovable...