|

Ralph Poust of the National Geodetic Survey on left admiring earthenware
survey marker. This mark was set in 1839 by Ferdinand Hassler.
|
Image ID: cgs01428, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Pennsylvania, Willow Grove
Photo Date: 1979
Category: Coast and Geodetic Survey/
• High Resolution Photo Available
|
|