The talk about the return to the gold standard in the British currency makes a recent test by a German bacteriologist of considerable interest. He declared, as a result of his experiments, that coins are far more sanitary than notes. On a note that had been in circulation for some time, and was subjected to frequent handling, as many as 143,000 bacteria were discovered. Metallic coins show a far smaller bacteria count. Their smooth surface does not encourage the accumulation' of these minute organisms.
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https://paperspast.natlib.govt.nz/newspapers/CHP19250428.2.32
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Press, Volume LXI, Issue 18367, 28 April 1925, Page 6
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84Untitled Press, Volume LXI, Issue 18367, 28 April 1925, Page 6
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