Spectrohelioscope
- Title
- Spectrohelioscope
- Collection
- Caltech Images Collection
- Series
- Individuals
- Identifier
- RWP3.1-10
- Extents
- 1 photographs
- Abstract
- Perspective close-up of spinning disk with radial slits for spectrohelopscope. Pencil on board, 10 x 12 inches, signed R. W. P., undated. George E. Hale, “The Spectrohelioscope and its Work, Part I: History, Instruments, Adjustments, and Methods of Observation, The Astrophysical Journal 70 (December 1929): 265-311. Published as Plate XIII. Porter Papers.