Kahn brought his first autochrome camera, and had Dutertre photograph the sights and people in these foreign lands.

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The autochrome achieved its color through a single glass plate smeared with millions of grains of potato starch, which were dyed red, green or violet and thus acted as tiny color filters.

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He set up a successful scholarship program that awarded grants to young academics to study in other countries, and when he heard of the autochrome, he saw a more far-reaching means of promoting peaceful international relations.

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