Details of exhibit
- Exhibition:
- 1914 Fifty-ninth Annual Exhibition of the Royal Photographic Society of Great Britain
- Exhibit title:
- Spectrum of the arc between electrodes of metallic calcium
- Exhibitor:
- G. V. McCauley
- Exhibitor 2:
- Henry Crew
- Section:
- Scientific and Technical Photographs, &c.
- Exhibit No.:
- 298
- Description:
- The new feature in this spectrum map is the increased sharpness of all lines, a result secured by the use of the arc under diminished pressure. The photographs were made under a pressure of about 10 millimetres of mercury. The comparison of spectrum is that of iron.
- Exhibit type:
- Photographic equipment and supplies
- Process:
- [Not Listed] ()
- Award:
- none
