Cambridge Digital Library

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1. ▾ Collection
   • Darwin Manuscripts (1)
   • Longitude Essays (3)
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   • Papers of Nevil Maskelyne (1)
   • Papers of the Board of Longitude (30)
   • Royal Greenwich Observatory Archives (38)
2. ▾ Subject
   • Astronomy (23)
   • Longitude (10)
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3. ▾ Date
   • 1700s C.E. (29)
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