Johnson type plane table outfit for comparatively high precision work, by W. and L.E. Gurley, Troy, New York, USA, 1914 Johnson type plane table outfit, 1914 1914
Engineer's transit theodolite, 6.5-inch, by W. & L.E. Gurley, Troy, NY, United States, 1911-1920. Fitted with Burt type solar attachment and accessories. Transit theodolite, American, 1911-1920 1911-1920