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
36
liquid than water, and so still more must the
skin of alcohol be weaker than that of water.
We can easily put this to the test o£ experi-
ment. In the game that is called the tug-of-
war you know well enough which side is the
strongest; it is the side which pulls the other
over the line. Let us then make alcohol and
Fig. 12.
water play the same game. In order that you
may see the water, it is coloured blue. It is
lying as a shallow layer on the bottom of this
white dish. At the present time the skin of
the water is pulling equally in all directions,
and so nothing happens; but if I pour a few
drops of alcohol into the middle, then at the
line which separates the alcohol from the water