## CURRENT TOPICS. 425 As advantages it is claimed that but a single image is necessary for photography in colors, that the same film permits projection in black and white or in colors, that the simplicity of the process makes it accessible to all, that commercial photographic and projection appar
โฆ LIBER โฆ
The origin of the spectrum of the aurora : L. Vegard, H. Kamerlingh Onnes and W.H. Keeson. (Comptes rendus, April 6, 1925. G.F.S.
โ Scribed by G.F.S.
- Publisher
- Elsevier Science
- Year
- 1925
- Tongue
- English
- Weight
- 86 KB
- Volume
- 200
- Category
- Article
- ISSN
- 0016-0032
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