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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THE FORCES WHICH MOULD THEM.
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tick, audible in every part of this large room
(Fig. 48). Now I want you to notice how the
vibration is magnified by the action I have
described. I now hold the nozzle close to the
rubber sheet, and you can hear nothing. As I
gradually raise it a faint echo is produced,
which gradually gets louder and louder, until
at last it is more like a hammer striking an
anvil than the tick of a watch.
I shall now change this watch for another