[no subject]

[GARY HEMMINGER <Hemmig@D-E.PVT.K12.NJ.US>]

> I had some students try this a few years ago. They measured the resonant
> frequency of the glass and then subjected it to a loud sound at that
> frequency. The video showed it shattering. Only later I learned that after
> many tries they gave up and shot the glass with a BB gun. It still looked
> good.

According to my accoustics professor,  Cyril Harris,  (the designer
of the renovated Avery Fischer hall at Lincoln Center),  the trick is
to make a small nick in the lip of the glass,  and to use fine
crystal.

*****************************************
  Gary Hemminger
  Dwight-Engelwood School
  315 E. Palisade Ave.
  Englewood, New Jersey
             07631
  e-mail: hemmig@d-e.org
*******************************************