| |
Sorensen's Engraving Pantograph in use by the U.S. Coast Survey 1867
1867 (illustration) 1869 (published)
Engraving, from a photograph, cropped
Creative Commons - Wikipedia
National Oceanic & Atmospheric Adminstration (NOAA), NOAA Central Library, Image ID: theb1160, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
LL/49796
1869, Report of the superintendent of the U.S. Coast and Geodetic Survey showing The Progress of the Work during the Fiscal Year 1867 (Washington: Government Printing Office), fig. 27
| |
LuminousLint 
@LuminousLint