Spectrohelioscope
- Title
- Spectrohelioscope
- Collection
- Caltech Images Collection
- Series
- Individuals
- Identifier
- RWP3.1-17
- Extents
- 1 photographs
- Abstract
- Perspective drawing of spectrohelioscope vibrating bar. Pencil and ink on Mt. Wilson letterhead stationery, backed with graph paper. 11 x 8.5 inches, unsigned and undated. Porter Papers.