| Date | 1830 |
| Author | Lister |
| Contribution | Described mathematics of achromatic lens. |
| Reference | Bradbury |
| Notes | J. J. Lister. Published (Phil. Trans. 130:187) guidelines for making achromatic objectives without accumulation of spherical aberration. This permitted rational design of objectives of the Amici type; see 1827. A landmark development, signaling the practicality of objectives with both types of correction. |
| Category | Miscellany |
| Pathogen Class | General |
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