From C. PITMAN
Q: New Scientist has recently printed a number of letters discussing
the scum that forms on the tea of some drinkers and not on that of others.
This is not the only drinker-dependent phenomenon I have noticed. Australian
beer is always gassed, and something similar happens with the foam that
forms the head. Many drinkers end up with the full head of froth in their
glasses when the liquid is gone while others seem to ‘kill’ it after only
a few sips. This appears to be independent of the beer brand. Can anyone
explain it?
C. Pitman Melbourne, Australia
