Which outcome happened when early Mesopotamian bronze founders exceeded safe copper-arsenic alloy ratios?

💡 Explanation

When arsenic ratios exceeded safe limits during casting, high arsenic vapor emission occurred because arsenic readily vaporizes at casting temperatures, posing a significant inhalation hazard to metalworkers. Therefore arsenic vapor toxicity increased danger to workers, rather than casting flaws, increased strength, or increased ductility, requiring more refined process control.

• Which mechanism limited maximum height of single-span arches in ancient Roman aqueducts that crossed deep valleys?
• Which optical consequence explains the limited resolution observed in Ibn al-Haytham's early lens experiments?
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• Which risk increased when ancient Mesopotamian irrigation systems delivered water with high dissolved salt content?