Pasteur and the Invisible Workers: How Fermentation Led to Soil
Pasteur and the Invisible Workers: How Fermentation Led to Soil In the 1850s, the French wine industry had a problem. Batches of wine were spoiling...
In the 1850s, the French wine industry had a problem.
Batches of wine were spoiling unpredictably. Some fermentations produced wine. Others produced vinegar, or sour mash, or something undrinkable. The chemistry appeared identical. The outcome was not.
The industry asked Louis Pasteur to find out why.
What he found changed biology, medicine, agriculture, and the understanding of life itself.
The Fermentation Question
The prevailing explanation for fermentation in the 1850s was chemical.
Organic matter broke down through chemical reactions. Heat, moisture, and the composition of the substrate determined what happened. Living organisms were not considered necessary to the process.
Pasteur looked at the failing wine batches under a microscope.
The batches that produced vinegar contained different microorganisms than the batches that produced wine.
He looked at more samples. The pattern held.
His conclusion was direct: fermentation was not a purely chemical process.
It was a biological one.
Specific...
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