Results for "Smithsonian Institution. Archives. Institutional History Division"
Astrophysical Observatory, Temporary Station, Bassour, Algeria
- Date: 1911 1911-1912
- Creator: Unknown
Astrophysical Observatory, Temporary Station, Bassour, Algeria
- Date: 1911 1911-1912
- Creator: Unknown
The Periodometer, a New Instrument for Analysing Solar Records
- Date: 1930 Between 1930 and 1934
Expert Mechanician Making Delicate Instruments for Solar Observations
- Date: 1930 Between 1930 and 1934
Lewis and Clark Centennial Exposition, Portland, Oregon, 1905
- Date: 1905
- Creator: Unknown
Lewis and Clark Centennial Exposition, Portland, Oregon, 1905
- Date: 1905
- Creator: Unknown
Lewis and Clark Centennial Exposition, Portland, Oregon, 1905
- Date: 1905
- Creator: Unknown
Lewis and Clark Centennial Exposition, Portland, Oregon, 1905
- Date: 1905
- Creator: Unknown
Lewis and Clark Centennial Exposition, Portland, Oregon, 1905
- Date: 1905
- Creator: Unknown
Lewis and Clark Centennial Exposition, Portland, Oregon, 1905
- Date: 1905
- Creator: Unknown
Astrophysical Observatory, Solar Tower, Mount Wilson, California
- Date: 1910 After 1910
- Creator: Unknown
Solar Observing Station on Table Mountain California in Winter
- Date: 1920 Between 1920 and 1934
