Cambridge Digital Library

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1. ▾ Collection
   • Longitude Essays (8)
   • National Maritime Museum Manuscripts (8)
   • National Maritime Museum Print Works (2)
   • Papers of Nevil Maskelyne (14)
   • Papers of the Board of Longitude (9)
   • Royal Greenwich Observatory Archives (41)
2. ▾ Subject
   • Astronomy (22)
   • Longitude (13)
   • Marine navigation (12)
   • Navigational aids (6)
   • Horology (5)
   • Mathematics (4)
   • Nautical instruments (4)
   • Navigation (4)
   • Time Measuring Instruments (3)
   • Science (2)
   • Astronomical instruments (1)
   • Dead reckoning (Navigation) (1)
   • Geographical exploration (1)
   • Instrument manufacture (1)
   • Medicine (1)
   • Nautical almanacs (1)
3. ▾ Date
   • 1600s C.E. (3)
   • 1700s C.E. (34)
   • 1800s C.E. (19)