An “electric finger” capable of measuring the thinnest piece of material has been devised. It will be employed to detect fraudulent reproductions of stock certificates, historic documents, or costly textiles.
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https://paperspast.natlib.govt.nz/newspapers/ESD19320108.2.122
Bibliographic details
Evening Star, Issue 20995, 8 January 1932, Page 14
Word Count
30Untitled Evening Star, Issue 20995, 8 January 1932, Page 14
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