Subject
- Astronomical instruments[remove]9
- Scientific Equipment9
- Astronomy5
- Science5
- Astronomical Observatories4
- Research Facilities4
- Solar Eclipse observations (6 April 1875), 18753
- Cameras2
- Events2
- Exhibitions2
- Optical Devices2
- Photographic Equipment and Supplies2
- Astrolabes1
- Astronomical Globes1
- Clocks & Watches1
- Cracow Archaeology and Art Exhibition, 1858-591
- Great Exhibition, London, 18511
- Heliostats1
- Photographic Types and Formats1
- Stereographs1