| Date | 1820 |
| Author | Anon. |
| Contribution | From this time on, glass slides of approximately 3" x 1" began to replace other bases for object preparation. |
| Reference | Anon. |
| Notes | Popular earlier bases included ivory "sliders" with carved holes and mica cover slips. |
| Category | Microscopy |
| Pathogen Class | General |
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