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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XI4 SOAP-BUBBLES, AND
which, thanks to a friend, I am able to use.
This watch is a repeater, that is, if you press
upon a nob it will strike, first the hour, then
the Quarters, and then the minutes. I think the
Fig. 48-
water-iet will enable you all to hear what time
it is. Listen! one, two, three, four; . . . ting-
tang, ting-tang; . . • one, two, three, four, five,
six. Six minutes after half-past four. You
notice that not only did you hear the number
of strokes, but the jet faithfully reproduced the