| Date | 1837 |
| Author | Amici |
| Contribution | Introduced the hemispherical front lens in the construction of objectives for the compound microscope. |
| Reference | Anon. |
| Notes | With this he achieved a magnification of 6000x, a numerical aperture of 0.4 and a resolving power of 0.0001 mm. Information from Dictionary of Sci. Biog? |
| Category | Microscopy |
| Pathogen Class | General |
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