Geomagnetism Fredericksburg

Adjustment of magnetic variometers at the old Cheltenham observatory by S. G. Townshend (left) and A. K. Ludy (right).

Detailed Description

Adjustment of magnetic variometers at the old Cheltenham observatory by S. G. Townshend (left) and A. K. Ludy (right).

Details

Image Dimensions: 520 x 415

Date Taken:

Location Taken: US