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- Astronomical instruments6
- Telescopes3
- Astronomy--Observations2
- Postcards--Collectors and collecting2
- Astronomical instruments--Great Britain--19th century1
- Astronomy--Charts, diagrams, etc.1
- Astronomy--Early works to 18001
- Micrometers (Instruments)1
- Optical instruments1
- Spectroscope1
- Stars--Atlases1
- Troughton & Simms, Ltd.1