File:NASA mini cooler on encasement of the U.S. Constitution.jpg

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English

"mini-cooler" used to determine the relative humidity of the atmosphere in the encasement of the U.S. Constitution.

Description	English: Scientists use a non-invasive technique to determine the relative humidity of the atmosphere in the encasement of the U.S. Constitution.
Date	22 April 2008
Source	https://www.nasa.gov/centers/langley/news/releases/2002/images/charters.html
Author	NASA

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