Yellowstone National Park - From a stereoview by Emerson & Stott, 239 W. Madison St., Chicago circa 1872. Original image by Wm. Henry Jackson in 1871, Hayden Survey. This stereo is not true stereo, but is pseudo-scopic. The original image by Jackson was an 8" x 10" glass plate negative, which was acquired by Emerson & Stott and printed as a stereo upon Jackson's return from the 1871 summer field season.