Cambridge Digital Library

Refine by:

1. ▸  Collection
   • Darwin Manuscripts (2)
   • Royal Greenwich Observatory Archives (8)
2. ▸  Subject
   • ASTRONOMY (8)
   • Astronomy (8)
   • Longitude (8)
   • Nautical instruments (6)
   • Navigation (science) (6)
   • Time Measuring Instruments (6)
   • Marine navigation (2)
   • Mathematics (2)
3. ▸  Page has transcription
   • No (8)
   • Yes (2)
4. ▸  Page has translation
   • No (10)
5. ▸  Languages
6. ▸  Date
   • 1800s C.E. (10)