Tower at Station Northome.Caouette on left, Osborn on right, Tryon observing.Triangulation party of Carl I. Aslakson
3/18/2019 2:24:55 PM
Date: 1934
Credit: Captain Ray Tryon, C&GS;
Location: Minnesota, Koochiching County
Subject: Geodesy
Subject: Triangulation
Subject: Towers
Subject: Bilby Steel