Refine by:
-
▾ Subject
- ASTRONOMY (10)
- Horology (11)
- Longitude (12)
- MATHEMATICS (4)
- MEDICAL SCIENCES (4)
- Marine navigation (20)
- Medicine (4)
- Time Measuring Instruments (1)
-
▾ Date
- 1700s C.E. (21)
- 1800s C.E. (3)