Lightkeeper orienting lights for distant observers.Tower at Station Northome.Osborne at lights, Caouette recording, Tryon at tent.Triangulation party of Carl I. Aslakson
3/18/2019 2:24:54 PM
Date: 1934
Credit: Captain Ray Tryon, C&GS;
Location: Minnesota, Koochiching County
Subject: Geodesy
Subject: Triangulation
Subject: Towers
Subject: Bilby Steel