Galvanometer, thermo, Duddell patent
1922
- Title
- Galvanometer, thermo, Duddell patent
- Collection
- Caltech Images Collection
- Series
- Scientific Instrument Photographs
- Identifier
- ST-PH-07
- Dates
- 1922
- Extents
- 1 photographs (negative)
- Abstract
- Has serial #46280. Original instructions and test results in file. Mfg: Cambridge & Paul Instrument Co.