Cambridge Digital Library

• Subject: Astronomical instruments

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1. ▾ Collection
   • Royal Greenwich Observatory Archives (1)
   • Transit of Venus (1)
2. ▾ Subject
   • Transit of Venus (1)
   • astronomical instruments (1)
   • observatories (1)
   • photography (1)
3. ▾ Date
   • 1800s C.E. (1)