Magnetic model showing changes at Philadephia
- Made:
- Unattributed place
Magnetic model showing changes at Philadephia, 1840-45
Details
- Category:
- Terrestrial Magnetism
- Object Number:
- 1980-1895
- type:
- model
- credit:
- Meteorological Office
Magnetic model showing changes at Philadephia, 1840-45