Assertion: burning charcoal | /r/CapableOf | reach temperatures of 900°c
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text: Free-burning charcoal could reach temperatures of 900°C, and with forced air supply (initially by using hollow wooden or bamboo tubes, later providing more powerful blast by waterwheel-powered bellows) its combustion could deliver nearly 2000°C, far higher than the melting points of common metals (lead melts at 232°C, copper at 1083°C, and iron at 1535°C).