Cambridge Digital Library

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1. ▸  Collection
   • Royal Greenwich Observatory Archives (4)
2. ▸  Subject
   • Longitude (4)
   • Marine navigation (4)
   • ASTRONOMY (3)
   • Astronomy (3)
   • Geographical exploration (2)
   • Mathematics (2)
   • Discoveries in geography (1)
   • Navigation (1)
3. ▸  Page has transcription
   • No (4)
4. ▸  Page has translation
   • No (4)
5. ▸  Languages
6. ▸  Date
   • 1700s C.E. (2)
   • 1800s C.E. (2)