What is called dry ice, or solid carbon dioxide gas, squeaks if it touches an artificial pearl or an imitation diamond. It squeaks or rattles when it touches a piece of quartz, and hy this means a quartz lens can bo distinguished from a glass one.
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https://paperspast.natlib.govt.nz/newspapers/ESD19360129.2.27.2
Bibliographic details
Evening Star, Issue 22249, 29 January 1936, Page 5
Word Count
46Page 5 Advertisements Column 2 Evening Star, Issue 22249, 29 January 1936, Page 5
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