Then I came to know other so-called 'Sheldon fans', the first one being John Danzer. I am grateful he made me aware of the final work that Sheldon had done near the end of his life. Incidentally, John Danzer had just worked out a tentative correlation scheme from Myers-Briggs typology to Sheldon's. From my own observations I did not find too difficult to derive what I believe to be a more accurate picture of the correlation scheme. It is interesting to notice that the basics of this scheme of mine happen to match almost exactly what had been independently worked out, more than 10 years ago, by Jim and Tyra Arraj in their books about Tracking the Elusive Human.
Preliminary results are the following.
Both correlations were expected, taking in account Sheldon's results. Of course I have yet to continue working out my observations, nevertheless I recommend to consider 0.3 - 0.5 as typical values for the physique to temperament correlation ratio. I thought it would have been expected to find one from Sheldon results. Note that from 135 people, there is less than one percent chance that a correlation ratio higher than 0.22 would be obtained purely by random. These significative correlations were expected, taking in account Sheldon's results.