Refine by:
-
▾ Subject
- Marine navigation (34)
- Time Measuring Instruments (32)
- Transit of Venus (11)
- observatories (11)
- scientific instruments (11)
- Longitude (7)
- ASTRONOMY (5)
- Journal (5)
- Navigational aids (3)
- Magnetism (2)
- Horology (1)
- Legislation (1)
-
▾ Date
- 1700s C.E. (5)
- 1800s C.E. (59)