Cambridge Digital Library

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1. ▾ Collection
   • Papers of the Board of Longitude (24)
   • Royal Greenwich Observatory Archives (24)
2. ▾ Subject
   • Longitude (13)
   • Legislation (11)
   • Navigational aids (2)
3. ▾ Date
   • 1600s C.E. (1)
   • 1800s C.E. (23)