Chemistry: heat conduction in fluids - Vintage Nostalgia
Chemistry: heat conduction in fluids

Water is boiling at the top of the test tube, but it is cold at the bottom.

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Chemistry: distillation by alembic - Vintage Nostalgia
Chemistry: distillation by alembic

Illustration from an old chemistry book

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Chemistry: heating by vapor - Vintage Nostalgia
Chemistry: heating by vapor

The bended glass pipe canalizes vapor from the boiling water in the closed flask to the receiving glass on the left, causing the water inside to boil too.

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Chemistry: transition from boiling water to vapor. - Vintage Nostalgia
Chemistry: transition from boiling water to vapor.

Illustration from an old chemistry book. Occasionally the same happens in the kitchen as well.

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