President Roosevelt running an American steam-shovel at Culebra Cut, Panama Canal
President Roosevelt running an American steam-shovel at Culebra Cut, Panama Canal
President Roosevelt discussing America's task with workmen at Bas Obispo, Panama Canal
Spanish laborers at work in Culebra Cut and loaded train hauling dirt from canal
Tunnel No. 2, head of Echo Canon
Sudbury River Conduit, B.W.W., div. 4, sec. 16, Oct. 18, 1876. View taken at the west end of narrow rock cut looking east.