Bronze working

Mixing Metals
''Now that we know how to make metals as liquid as water, what would happen if we mixed some together? Maybe we could create some new metals that never exist in nature with better properties? Copper is abundant and useful, but it is soft and it wears quickly. Maybe we should experiment mixing it with other metals to see if we can improve this?''

Potential Requirements

 * Metal Casting
 * Smelting Tin into ingots
 * Or having tin and copper in the same stockpile
 * Having at least 3 fully working foundry's (Might need them to be Foundry 2's)

Info
Bronze working knowledge unlocks the Bronze Age.