Cambridge Digital Library

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1. ▾ Collection
   • National Maritime Museum Manuscripts (5)
   • Papers of George Biddell Airy (2)
   • Papers of Nevil Maskelyne (1)
   • Papers of the Board of Longitude (3)
   • Royal Greenwich Observatory Archives (11)
2. ▾ Subject
   • Astronomy (11)
   • Marine navigation (8)
   • Mathematics (6)
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   • Astronomical Observatories (1)
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   • Time Measuring Instruments (1)
3. ▾ Date
   • 1700s C.E. (5)
   • 1800s C.E. (7)