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<p>[QUOTE=&quot;Lolli, post: 4203837, member: 96900&quot;]They knew in ancient times already about the different density of gold , silver and copper. See for example the very famous story about Amchimedes, who chaught the goldsmith, who mixed base metal into the crown for king Hieron II.</p><p>We had this early in school, so I remembered this story well especially because he said in this context &quot;heureka&quot;.</p><p>He did the crown in water and determined how much the water rised then gold with same weight and determined how much the water rised. The water rised more when he did the crown in showing that the crown could not be made of pure gold.</p><p><br /></p><p><a href="https://www.math.nyu.edu/~crorres/Archimedes/Crown/CrownIntro.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.math.nyu.edu/~crorres/Archimedes/Crown/CrownIntro.html" rel="nofollow">https://www.math.nyu.edu/~crorres/Archimedes/Crown/CrownIntro.html</a>[/QUOTE]</p><p><br /></p>

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