I must make special mention of the ring of Irish glass, as this is an
important point. All British glass has a clear, definite, bright ring,
but to anyone with a musical ear it will be interesting to listen to
the peculiar throb in Irish glass, not so much a ring as a rich throb,
sometimes (particularly in large pieces) like a vibrato between two
notes. I do not say that you get this in all Irish glass, only in the
greater part of it.
No one, for instance, would expect a candlestick to ring or a
salt-cellar, or a thick shallow piece heavily cut. Jugs, as a rule,
also have a special dislike to displaying their voices, so, naturally,
people must use their discernment.