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Subject
- Alvan Clark & Sons2
- Astronomical instruments34
- Astronomical instruments--Great Britain--19th century1
- Astronomy1
- Astronomy--Charts, diagrams, etc.1
- Astronomy--Early works to 18001
- Astronomy--Observations79
- Astronomy--United States--Observations358
- Carl-Zeiss-Stiftung Jena1
- Clark, Alvan Graham, 1832-18974
- Fitz, Henry, 1808-18631
- Micrometers (Instruments)2
- Milky Way1
- Optical instruments2
- Postcards--Collectors and collecting437
- Profit-sharing1
- Spectroscope1
- Spherical astronomy1
- Stars--Atlases1
- Telescopes22