Thank you all for explaining "H".  and,  I'm happy if there is enough in a
glass to quench my thirst when I need it.  I could care less if it is half full
OR half empty.    Actually, now that I think about it, the glass is neither
half full nor half empty.  Half of the glass is full and the other half is
empty!  there!  now you can tear that idea to shreds.
I love you all (and Mara)
OLLIVER