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I've seen a few of these displayed in government buildings and they are beautiful to look at. I wish I had space in my home for a set.
The United States Geological Survey (USGS) is making some historical copper engraving available for purchase to the general public. These engravings, some of which date back to the 1800s', are currently being featured on the home page.
Between the 1880s and the 1950s, the USGS produced engravings used to reproduce topographic and geologic maps within the agency. Last spring the agency began the excessing of engravings Many have been transfered to other federal agencies. Some have been donated to colleges, universities, and libraries. The metal engravings are mostly copper alloy with a few made of zinc. Most of the plates are 17 x 21 inches and weight about 12.5 pounds.
The engravings are mainly of maps showing cultural, transportation, boundary features, topography, hydrography, or geology.These engravings are hand made and are the mirror image (left to right reversed) for printing. Therefore, the text and words are reversed on the engravings.
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