| Date | 1877 |
| Author | Koch |
| Contribution | d. Made dry films of bacteria and stained them with methylene blue. |
| Reference | Brock |
| Notes | The films were air-dried and then fixed in ethanol (as in Ehrlich's method for blood films). A cover-slip was added for permanence. This note was not based on Brock, but the work is thoroughly coverd by Brock. Brock stressed the importance of the discovery that bacteria could be dried on a slide without perceptible morphological distortion. |
| Category | Miscellany |
| Pathogen Class | Bacteria |
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