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Pasteur in his study. French microbiologist and chemist Louis Pasteur (1822-1895) found that fermentation is caused by micro-organisms, and also proposed the germ theory of disease. He developed a vaccine against rabies, which led to the founding of the Pasteur Institute in 1888. He discovered the anthrax bacterium and developed a vaccine against it. He also discovered that gentle heating of wine and beer preserves them from souring. Called pasteurisation, this is now widely used in the food industry. Artwork from the tenth volume (second period of 1892) of the French popular science weekly 'La Science Illustree'.
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