Swan neck flask experiment to disprove spontaneous generation
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Louis Pasteur's 1859 experiment is widely seen as having settled the question of spontaneous generation. He boiled a meat broth in a swan neck flask. The bend in the neck of the flask prevented falling particles from reaching the broth, while still allowing the free flow of air.
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Louis Pasteur's spontaneous generation experiment illustrates the fact that the spoilage of liquid was caused by particles in the air rather than the air itself. These experiments were important pieces of evidence supporting the idea of germ theory of disease.
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