| Date | 1825 |
| Author | Goring |
| Contribution | Introduced the use of standard test objects for comparing performance of objectives. |
| Reference | Anon. |
| Notes | Used the scales of butterfly wing (Morpho menelaus, according to Bradbury, who also mentions Van Heurck's use of scales of moth wing, but does not give date for either). |
| Category | Microscopy |
| Pathogen Class | General |
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