Refine by:
-
▾ Subject
- Legislation (14)
- Longitude (14)
- ASTRONOMY (5)
- Discoveries in geography (5)
- Geographical exploration (5)
- Marine navigation (5)
- Navigation (5)
- Navigational aids (5)
- Horology (4)
- Time Measuring Instruments (4)
- Astronomical Observatories (2)
- Nautical instruments (2)
- Compasses (1)
- Magnetism (1)
-
▾ Date
- 1700s C.E. (4)
- 1800s C.E. (27)