| Date | 1829 |
| Author | Wollaston |
| Contribution | Improved the simple microscope beyond his advance of 1812. |
| Reference | Anon. |
| Notes | He mounted two plano-convex lens with both flat surfaces facing the object, and reduced spherical aberration without so much loss of effective aperture. See 1812. |
| Category | Microscopy |
| Pathogen Class | General |
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