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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6o
SOAP-BUBBLES, AND
the cylinder is the same as that of the sphere
which balances it. Now at each end of a
short tube I shall blow an ordinary bubble,
but I shall pull the lower bubble by means
of another tube into the cylindrical form, and
finally blow in more or less air until the sides
Fig. 25.
of the cylinder are perfectly straight. That is
now done (Fig. 25), and the pressure in the
two bubbles must be exactly the same, as there
is a free passage of air between the two. On
measuring them you see that the sphere is
exactly double the cylinder in diameter. But