Letters: Sep. 20, 1926

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Where I come from, and all Southern Ohio, Fords are called "road lice." Now, if a "louse" is not a "bug," I wish that someone would kindly tell me what it is.

When TIME arrives at our house everything stops until it is read from cover to cover. By all means keep the footnotes.

H. H. MINISTER

Chauncey, Ohio

Kryptocyanine

Sirs:

The paragraph on "Smoke Photography" which appeared on p. 16 of the Aug. 30 issue is not quite accurate. The film, which is sensitive to infra-red rays, which penetrate haze (scarcely smoke), is sensitized with "kryptocyanine." This dye is not a secret in spite of its name; it was discovered by Adams and Haller at the color laboratory of the Bureau of Chemistry in 1919 and is made in our laboratories by Dr. H. T. Clarke. After many attempts we have succeeded in using it for sensitizing film.

W. K. MEES

Director, Research Laboratory Eastman Kodak Co. Rochester, N. Y.

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