200-inch mirror disc lying face down
- Title
- 200-inch mirror disc lying face down
- Collection
- Caltech Images Collection
- Series
- Academic Divisions and Departments
- Sub-Series
- Astronomy (Astrophysics)
- Identifier
- 10.22.56-1
- Extents
- 1 photographs (negative)
- Abstract
- Openings in back are filled with plaster of Paris casts.