Flies will not enter one large English jam factory, although 15,000 tons of jam are stored there in unsealed jars, because the windows arc fitted with amber glass, which cuts out the ultra-violet rays.
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Bibliographic details
Otago Daily Times, Issue 22122, 28 November 1933, Page 16
Word Count
34Page 16 Advertisements Column 6 Otago Daily Times, Issue 22122, 28 November 1933, Page 16
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