Subject
- Optical Devices[remove]18
- Scientific Equipment18
- Telescopes11
- Science8
- Astronomy7
- Events6
- Exhibitions6
- Great Exhibition, London, 18515
- Lenses5
- Astronomical Observatories4
- Photographic Types and Formats4
- Research Facilities4
- Stereographs4
- Named Collections3
- Talbot Collection3
- Astronomical instruments2
- Clothing and Dress2
- Geodesic Conference, Nice, 18872
- Boatmen1
- Cameras1