Chemistry, slow combustion - Vintage Nostalgia
Chemistry, slow combustion

Slow combustion: platinum spiral, heated to incandescence on an alcohol lamp, burns further with slow combustion in a mild heated glass containing a small amount of alcohol.

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Chemistry, bohric acid pearl on a platinum ring - Vintage Nostalgia
Chemistry, bohric acid pearl on a platinum ring

Formation of a glassy bohric acid pearl on a platinum ring.

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