File: 1951PreservationOfDeclarationOfIndependenceByNBS.jpg - New World Encyclopedia

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	21:33, 24 August 2006		720 × 568 (271 KB)	David Burgess (talk \| contribs)	[http://en.wikipedia.org/wiki/Image:1951PreservationOfDeclarationOfIndependenceByNBS.jpg source and rights]

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Image title	Preservation by NBS in 1951 of the Declaration of Independence (shown) and the Constitution of the United States followed ear's of research on the permanence of governmental documents. Light, heat, humidity, and many other factors were assessed, but the principal enemy of records proved to be the common air pollutant, sulphur dioxide.
Orientation	Normal
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Software used	Adobe Photoshop 7.0
File change date and time	09:37, 22 April 2003
Color space	sRGB