Copy of a grape vine with two bunches of grapes to illustrate a fermentation experiment performed by Louis Pasteur in 1862

Made:
1901-2000 in Europe
Copy of a grape vine with two bunches of grapes

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Copy of a grape vine with two bunches of grapes
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Copy of a grape vine with two bunches of grapes, one wrapped in cotton wool, the other exposed, to illustrate an experiment performed by Pasteur on the fermentation of grape juice

This model illustrates an experiment performed in 1862 by Louis Pasteur (1822-1895) to study the fermentation of grape juice. One bunch of grapes is wrapped in sterilised cotton wool while the other is exposed to the air. When both bunches were ripe, they were crushed separately in vessels – those from the covered bunch did not ferment but the uncovered ones did. This experiment showed that alcoholic fermentation only happens when the grape juice comes into contact with germs of yeast in the air. This experiment was one of a series by Pasteur that disproved existing ideas about spontaneous generation.

Details

Category:
Microbiology
Collection:
Sir Henry Wellcome's Museum Collection
Object Number:
A63414
Materials:
cloth, plastic and cotton
Measurements:
overall: 108 mm x 512 mm x 224 mm, .09kg
type:
model
credit:
Institut Pasteur