Hope I have the correct address this time.
I am still trying to be at ease with the new (to me) terminology of PCT.
Biological Machines by Peter Calow published in 1976 is proving helpful.
The servo-mechanism concept requires a different kind of thinking. Now I
understand the utility of using 'disturbance' instead of stimuli.
It is interesting that the Calow book was published just a few years after
the Powers book.
Does anyone know anything about Calow?
Ellery elanier@crl.nmsu.edu