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kubera

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PostSubject: metalurgy   Thu May 02, 2013 2:31 pm

Interesting that until the 13 century we could only isolate 7 metals in usable quantities ,
(gold, silver, copper,
mercury, tin , iron and lead
, )
by 1800 we had only added Tin Platinum Antimony Bismuth Zinc Arsenic to this list with a few others that could only be reproduced in small lab samples

Cobalt, Nickel, Manganese, Molybdenum, Tungsten, Tellurium, Beryllium
, Chromium, Uranium, Zirconium and Yttrium


http://neon.mems.cmu.edu/cramb/Processing/history.html

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SteveL
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PostSubject: Re: metalurgy   Fri May 03, 2013 10:36 pm

As the/a resident student of medieval history, thank you for that info.
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