Fine grinding of 20-inch mirror disc on two-foot grinding machine
1937 February
- Title
- Fine grinding of 20-inch mirror disc on two-foot grinding machine
- Collection
- Caltech Photographs
- Series
- Photographs of Academic Divisions and Departments
- Sub-Series
- Astronomy (Astrophysics)
- Dates
- 1937 February
- Extents
- 1 photographs