| Date | 1811 |
| Author | Brewster |
| Contribution | Suggested the use of gem stones in making simple microscopes, because of their higher refractive index. |
| Reference | Bradbury |
| Notes | Sir David Brewster, who is cited by Bradbury for several contributions to microscopy. See Prichard 1824. |
| Category | Microscopy |
| Pathogen Class | General |
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