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▾ Collection
- Papers of the Board of Longitude (17)
- Royal Greenwich Observatory Archives (17)
▾ Subject
- Longitude (16)
- Horology (14)
- Time Measuring Instruments (14)
- Chronomoters (2)
- Legislation (1)
▾ Date
- 1700s C.E. (1)
- 1800s C.E. (16)