| Introduction | |
| 1 | Stanhopes |
| 2 | The cheapness of Stanhopes in Paris (1884) |
| 3 | Using photomicrographs in spectacles for maps, legal notes and identifying criminals |
| Introduction | |
| 1 | Stanhopes |
| 2 | The cheapness of Stanhopes in Paris (1884) |
| 3 | Using photomicrographs in spectacles for maps, legal notes and identifying criminals |