THE OBEDIENT MOTH BALL.
• You exhibit an ordinary moth ball, which is then dropped into a glass of water.. It sinks, and at your command it rises to the surface. On a further command it goes to the bottom again, and, then, finally, to the top, when it is removed and passed round for inspection. Really, there’s nothing to it. ,'The moth ball is simply a moth ball; but the water is carbonated water procured - from the chemist. When the moth ball is dropped into the water it naturally sinks to the bottom. At the bottom of the glass, however, it absorbs gas from the carbonated water and presently becomes light enough to bob its way to the surface, only to sink again as the gas escapes. To appear to understand the language of moth balls you need only time some mysterious sounds with the chemical reaction —and there yor arej; , i
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https://paperspast.natlib.govt.nz/newspapers/TDN19300906.2.127.26.18
Bibliographic details
Taranaki Daily News, 6 September 1930, Page 8 (Supplement)
Word Count
152THE OBEDIENT MOTH BALL. Taranaki Daily News, 6 September 1930, Page 8 (Supplement)
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