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Letter from Linus Pauling to George A. Richter. October 26, 1944.
Pauling writes to request Richter's advice concerning work on invisible inks.

Transcript

October 26, 1944

AIR MAIL

SECRET

Mr. G.A. Richter

Eastman Kodak Company

Rochester, New York

Dear Mr. Richter:

I believe that our investigations are now at the stage where we could profit very much by advice from you, and i hope that you are continuing your plans for a visit to Pasadena. Any time from now on would be satisfactory to us; some time in November would be very good. We would like very much also to see Professor Lamb, in case that he found it possible to come here.

Could you supply us with some samples of paper showing the minimum amount of fluorescence when illuminated with ultra-violet light?

Sincerely yours,

Linus Pauling

LP:js

cc to H.M. Chadwell

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