pl23_cgs05107.jpg
![Diagram of electrotype apparatus as devised by George Mathiot of the CoastSurvey cgs05107.jpg Diagram of electrotype apparatus as devised by George Mathiot of the CoastSurvey](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs05107.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23cgs05107jpgDescription
Diagram of electrotype apparatus as devised by George Mathiot of the CoastSurvey. This apparatus allowed the reproduction of copper-plate engravingseach of which could only survive 500 to a 1000 or so press impressions beforewearing away sufficiently to be useless. This system allowed the production ofthousands of charts via plate copies produced from the original engraving.
Credit
NARA C&GS; Colllection
Display Date
1851
Collection
Historic Coast & Geodetic Survey
Historic Maps
General
Keywords
Coast and Geodetic Survey
Archive Sketch