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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1^8 SOAP-BUBBLES, AND
it has ceased to produce any visible effect on
pieces of paper, or even on a delicate gold-leaf
electroscope.
Bouncing Water-jets.
This beautiful experiment of Lord Ray-
leigh’s requires a little management to make it
work in a satisfactory manner. Take a piece
of quill-glass tube and draw it out to a very
slight extent (see a former note), so as to
make a neck about one-eighth of an inch
in diameter at the narrowest part. Break the
tube just at this place, after first nicking it
there with a file. Connect each of these tubes
by means of an india-rubber pipe, or other-
wise, with a supply of water in a bottle, and
pinch the tubes with a screw-clip until two
equal jets of water are formed. So hold the
nozzles that these meet in their smooth por-
tions at every small angle. They will then
for a short time bounce away from one
another without mixing. If the air is very-
dusty, if the water is not clean, or if air-
bubbles are carried along in the pipes, the
two jets will at once join together. In the