Refine by:
-
▾ Subject
- ASTRONOMY (21)
- Longitude (17)
- Nautical instruments (12)
- Marine navigation (10)
- Magnetism (9)
- Time Measuring Instruments (9)
- Navigational aids (5)
- Astronomical Observatories (3)
- Colonial administration (3)
- SCIENCE (2)
- photography (2)
- scientific instruments (2)
- telescopes (2)
- Compasses (1)
- Geodesy (1)
- Geographical exploration (1)
- Jupiter (Planet) (1)
- Legislation (1)
- Navigation (science) (1)
- trains (1)
-
▾ Date
- 1700s C.E. (10)
- 1800s C.E. (20)