Aperture Plate for a Microscope, by Powell & Lealand, London, c. 1865
Inventory Number 39209
Microscope Objective with Variable Aperture Disc, by Powell & Lealand, London, Late 19th CenturyInventory Number 94749
Demo Kit for Microscope with Accessories, by Powell & Lealand, London, 1845Inventory Number 39606- Warm Microscope Stage, by Powell & Lealand, London, c. 1860Inventory Number 47021
- Microscope Accessories, by Powell & Lealand, London, c. 1849Inventory Number 51087
