The near infra-red absorption spectra of some organic liquids: J. W. Ellis. (Phys. Rev., Jan., 1924.)
✍ Scribed by G.F.S.
- Publisher
- Elsevier Science
- Year
- 1924
- Tongue
- English
- Weight
- 66 KB
- Volume
- 197
- Category
- Article
- ISSN
- 0016-0032
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✦ Synopsis
EASTMAN KODAK COMPANY NOTES.
[J. F. I.
with the silver image absen.t, and film having a unifo,rm optical density of 3.46, were found to be o.434 and o.427 gram-calorie. respectively. The difference between " clear " film and film which transmitted o.I per cent. of visible radiation is, therefore, only o.oo7, which is equivalent to app,roximately 2 per cent. Thus the specifc heat of motion picture film is practically independent of the density of the picture. For cellulose acetate base: this value was found to be o.482 gram-calorie. Using a standard projector, adjusted as near as possible to practical conditions, film containing practically no developed silver, film having an average optical density of o.56, and film having a uniform density of 3.46