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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THE FORCES WHICH MOULD THEM. 167
be used, or a small weight
should be fastened to the
handle of the ring. The
ring should be so heavy that
the sides of the bubble make
an angle of thirty or forty-
degrees with the vertical,
where they meet the ring as
indicated in Fig. 56. The
wetted end of the pipe is now
to be inserted through the
top of the bubble, until it
has penetrated a clear half
inch or so. A new bubble
can now be blown any size
almost that may be desired.
Fig. 68.
To remove the pipe a slow motion will be
fatal, because it will raise the inner bubble
until it and the outer one both meet the pipe
at the same place. This will bring them into
true contact. On the other hand, a violent