Soap Bubbles
and the Forces which Mould Them
Forfatter: F. R. S., A. R. S. M., C. V. Boys
År: 1890
Serie: Romance of Science Series
Sted: London
Sider: 178
UDK: 532
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PRACTICAL HINTS.
I hope that the following practical hints
may be found useful by those who wish them-
selves to successfully perform the experiments
already described.
Drop with India-rubber Surface.
A sheet of thin india-rubber, about the
thickness of that used in air-balls, as it appears
before they have been blown out, must be
stretched over a ring of wood or metal eighteen
inches in diameter, and securely wired round
the edge. The wire will hold the india-rubber
better if the edge is grooved. This does not
succeed if tried on a smaller scale. This ex-
periment was shown by Sir W. Thomson at
the Royal Institution.
Jumping Frame.
This is easily made by taking a light glass
globe about two inches in diameter, such, for