Spectrohelioscope
1928
- Title
- Spectrohelioscope
- Collection
- Caltech Images Collection
- Series
- Individuals
- Identifier
- RWP3.1-3
- Dates
- 1928
- Extents
- 1 photographs
- Abstract
- Schematic drawing of complete spectrohelioscope setup with observer, with detail inserts showing eyepiece and optical train. Ink drawing printed on card stock, 4.25 x 3.25 inches, signed R. W. P. and dated 1928. This version published in Amateur Telescope Making, Book 1, p. 193. Porter Papers.