When steel is exposed to the action of eea-water and the weather it is said to corrode at the rate of a»n inch in eighty-two years ; an inch of iron under the same conditions corrodes in 190 years. When exposed to fresh water and the weather the periods are 170 years for steel and 630 years for. iron.
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Northland Age, Volume IV, Issue 47, 13 July 1908, Page 8
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58Untitled Northland Age, Volume IV, Issue 47, 13 July 1908, Page 8
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