stereographs

love those stereograms, especially when they catch something as eerie & simple as this location:


The Diamond Pass, Ocklawaha River, Florida, U. S. A. (1870?-1910?)

or when it is just a ghost-image, and all the tape and markings turn it into an artifact:

View [?] at Niagara no. 69. (1854-[1865?])

and when symmetry is being eaten away:

State Lunatic Asylum, Trenton, N.J. ([ca. 1860])