| Date | 1855 |
| Author | Pasteur |
| Contribution | Showed that crude alcohol from beet was not optically same as from molasses. |
| Reference | Geison |
| Notes | Thus moved from chemistry of optical rotation in polarized light to the study of fermentation. See Geison for full account, and discussion of motivation. |
| Category | Miscellany |
| Pathogen Class | General |
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