1950s dip circle. Dip circles are used to measure the angle between the horizon and the Earth's magnetic field (the dip angle) at a given point on the Earth's surface | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Davies, Gregory |
Bildgröße: | 4998 px × 3514 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |