It has been estimated that about 20.0G0.CC0 tons ef railway lines are lost throughout the world every year through the corrosion of rust.
The age of a salmon can bo ascertain ed by examining one of ite scales through a microscope. .It contains a number of tiny lines, which multiply at the rate of sixteen every year.
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https://paperspast.natlib.govt.nz/newspapers/DOM19261202.2.148
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Dominion, Volume 20, Issue 58, 2 December 1926, Page 13
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57Untitled Dominion, Volume 20, Issue 58, 2 December 1926, Page 13
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