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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44
SOAP-BUBBLES, AND
drop, so that very small drops should appear like
perfect little balls. If you have found any diffi-
culty in following this argument, a very simple
illustration will make it clear. You many of
you probably know how by folding paper to
make this little thing which I hold in my
hand (Fig. 15). It is called a cat-box, because
of its power of dispelling cats when it is filled
Fig. 15-
with water and well thrown. This one, large
enough to hold about half a pint, is made out
of a small piece of the Times newspaper.
You may fill it with water and carry it about
and throw it with your full power, and the
strength of the paper skin is sufficient to hold
it together until it hits anything, when of
course it bursts and the water comes out. On