Boulder Geomagnetic Observatory
![Image: Boulder Geomagnetic Observatory](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/theodolite.jpg?itok=dM5Gz_hT)
Detailed Description
Zeiss Jena 010B Theodolite for making absolute measurements at Boulder magnetic observatory.
Sources/Usage
Public Domain.
Zeiss Jena 010B Theodolite for making absolute measurements at Boulder magnetic observatory.
Public Domain.