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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SOAP-BUBBLES, AND
space on one side as great, and therefore on
the other side, where the film is, as small,
as possible. Or again, in this second ring the
thread is double for a short distance in the
middle. If I break the film between the
Fig. 19.
threads they are at once pulled apart, and are
pulled into a perfect circle (Fig. 20), because
that is the form which makes the space within
it as great as possible, and therefore leaves the
space outside it as small as possible. You will
also notice, that though the circle will not