Refine by:
-
▾ Subject
- Longitude (8)
- Navigational aids (5)
- ASTRONOMY (4)
- Nautical instruments (3)
- Astronomical Observatories (2)
- SCIENCE (2)
- Legislation (1)
-
▾ Date
- 1600s C.E. (1)
- 1700s C.E. (26)
- 1800s C.E. (8)