Glass-bowls,
Cloud-chamber bowls
MATERIALS: Redwood frame, glass carboys, rope. and funnels for
suspension purposes. TONES: From 10 to 12 tops and bottoms of
12-gallon Pyrex carboys (the bottoms are inverted). At the University
of California Radiation Laboratory, at one time, centers were
cut from such carboys for use in "cloud-chamber" experiments.
Played on the edges with small soft mallets, also on the flat
tops. The bowls give a bell-like tone, and each has at least one
inharmonic overtone. When one of them breaks it is virtually impossible
to find an exact duplicate.
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