Results for "National Radio Astronomy Observatory (U.S.)"
![Photo-Recording Magnetometer, 1900, Smithsonian Institution Archives, SIA Acc. 11-006 [MAH-4693].](/sites/default/files/styles/sia-image-200/public/site_util_images/image_missing.jpg "Photo-Recording Magnetometer, 1900, Smithsonian Institution Archives, SIA Acc. 11-006 [MAH-4693].")
Photo-Recording Magnetometer
- Date: 1900 Circa 1900
- Creator: United States National Museum Photographic Laboratory
Photo-Recording Magnetometer
- Date: 1900 Circa 1900
- Creator: United States National Museum Photographic Laboratory
![Photo-Recording Magnetometer, 1900, Smithsonian Institution Archives, SIA Acc. 11-006 [MAH-4693].](https://ids.si.edu/ids/iiif/SIA-MAH-4693/full/250,/0/default.jpg "Photo-Recording Magnetometer, 1900, Smithsonian Institution Archives, SIA Acc. 11-006 [MAH-4693].")
![Photo-Recording Magnetometer, 1900, Smithsonian Institution Archives, SIA Acc. 11-006 [MAH-4692].](https://ids.si.edu/ids/iiif/SIA-MAH-4692-000002/full/250,/0/default.jpg "Photo-Recording Magnetometer, 1900, Smithsonian Institution Archives, SIA Acc. 11-006 [MAH-4692].")