NOAA Photo Library Banner
Takes you to the Top Page Takes you to the About this Site page. Takes you to the Contacts page. Takes you to the HELP page. Takes you to the Credits page. Takes you to the Collections page. Takes you to the search page. Takes you to the Links page.

NOAA Photo Library Image - cgs05107

Diagram of electrotype apparatus as devised by George Mathiot of the Coast Survey. This apparatus allowed the reproduction of copper-plate engravings each of which could only survive 500 to a 1000 or so press impressions before wearing away sufficiently to be useless. This system allowed the production of thousands of charts via plate copies produced from the original engraving.

Image ID: cgs05107, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Photo Date: 1851
Credit: NARA C&GS Colllection

Category: Coast and Geodetic Survey/Archive Sketch/

High Resolution Photo Available

Publication of the U.S. Department of Commerce, National Oceanic & Atmospheric Adminstration (NOAA),
NOAA Central Library
NOAA Privacy Policy | NOAA Disclaimer
Last Updated:
June 10, 2016