Keywords: stereoscopic stereophotography stereophotographs historical usgs history geology mapping black and white blackandwhite bnw stereograph blackandwhite monochrome outdoor black and white Canyon of the West Gallatin, Montana Territory. Our trail over the rocks, Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 982) Canyon of the West Gallatin, Montana Territory. Our trail over the rocks, Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 982) |