Tuesday, 8 September 2015

7 METALS OF ANTIQUITY

“the metals upon which civilization was based” as:
  1. Gold (ca) 6000BC
  2. Copper (ca) 4200BC
  3. Silver (ca) 4000BC
  4. Lead (ca) 3500BC
  5. Tin (ca) 1750BC
  6. Iron,smelte, (ca) 1500BC
  7. Mercury (ca) 750BC
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