Spectrohelioscope
1929
- Title
- Spectrohelioscope
- Collection
- Caltech Images Collection
- Series
- Individuals
- Identifier
- RWP3.1-19
- Dates
- 1929
- Extents
- 1 photographs
- Abstract
- Perspective drawing of observer using the spectrohelioscope. 11.75 x 8 inches, signed R. W. P., dated 1929. Porter Papers.