The crown of a human tooth is covered by a brilliant white cap of enamel, which is not only the hardest tissue of the body, consisting at is does of 95.5 per cent, of miners! matter, but also the hardest known organic substance.
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Bibliographic details
Southland Times, Issue 19859, 3 May 1926, Page 8
Word Count
43Page 8 Advertisements Column 3 Southland Times, Issue 19859, 3 May 1926, Page 8
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