Refine by:
-
▾ Subject
- Marine navigation (32)
- Longitude (24)
- Horology (22)
- ASTRONOMY (11)
- Commerce (1)
- MATHEMATICS (1)
- MEDICAL SCIENCES (1)
- Magnetism (1)
- Medicine (1)
- Navigational aids (1)
- TRADE (1)
-
▾ Date
- 1700s C.E. (28)
- 1800s C.E. (9)