✦ LIBER ✦

The spectrum of the aurora borealis and the upper layers of the atmosphere: L. Vegard. (Comptes Rendus, April 3, 1923.)

✍ Scribed by G.F.S.

Publisher: Elsevier Science
Year: 1923
Tongue: English
Weight: 65 KB
Volume: 196
Category: Article
ISSN: 0016-0032
DOI: 10.1016/s0016-0032(23)91041-0

No coin nor oath required. For personal study only.

✦ Synopsis

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 apparatus can be employed: including moving picture apparatus. To use existing apparatus it is necessary only to put in the plane of diaphragm the three color screens, and to employ K.D.B. films. K.D.B. appears to be the result of combining the initials of Messrs. Berthon and Keller-Dorian, the inventors.

G.F.S.

📜 SIMILAR VOLUMES

The origin of the spectrum of the aurora

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.

✍ G.F.S. 📂 Article 📅 1925 🏛 Elsevier Science 🌐 English ⚖ 86 KB

The heat of vaporization of neon: E. Mat

The heat of vaporization of neon: E. Mathias, C. A. Crommelin and H. Kamerlingh Onnes (Comptes Rendus, April 3, 1923.)

✍ G.F.S. 📂 Article 📅 1923 🏛 Elsevier Science 🌐 English ⚖ 48 KB

Using data determined in the cryogenic laboratory of the University of Leyden, where recently a temperature only a fraction of a degree above the absolute zero has been attained, the authors have calculated the value of L, the heat of vaporization at the critical temperature, for the monatomic gas n