The Library of Congress has digitized a collection of 1920s stereographs ranging from racy to comic toโฆ other? https://www.loc.gov/pictures/search/?va=exact&sp=1&q=Exhibit+Supply+Company+%28Chicago%2C+Ill.%29&fa=displayed%3Aanywhere&fi=author&sg=true&op=EQUAL
@overholt If you don't know how stereograths work, they use parallax to produce a 3d image. You look at one image with each eye and your brain constructs a sensation of depth. Its pretty easy.
1) hold your phone sideways and open only the image, close any alt text or headers or footers.
2) hold the phone about 15cm/6in from your eyes, then cross your eyes so the two images merge in the middle.
3) move the phone slightly in and out until the image is in focus.
That's it. Might take practice.
@overholt If you don't know how stereograths work, they use parallax to produce a 3d image. You look at one image with each eye and your brain constructs a sensation of depth. Its pretty easy.
1) hold your phone sideways and open only the image, close any alt text or headers or footers.
2) hold the phone about 15cm/6in from your eyes, then cross your eyes so the two images merge in the middle.
3) move the phone slightly in and out until the image is in focus.