Once the foam is of the desired thickness, the
rest of the beer can be poured in gently along
the side of the glass, avoiding aeration and
nucleation of new bubbles. The glass itself
should be clean of any residues of oil or soap,
which interfere with foaming. (These
molecules have water-avoiding ends that pull
the similar ends of the bubble-stabilizing
proteins out of the bubbles.) By the same
token, if a newly poured beer threatens to
foam over, it can often be stopped in its tracks
by touching the rim with a finger or lip, which
carry traces of oil.
Kinds and Qualities of Beer
Beers are a wonderfully diverse group of
drinks, and a good beer can be a mouth-filling
experience, one that rewards slow savoring.
There are several qualities worth appreciating:
Color, which can range from pale yellow