To view these stereograms in 3D, you need to merge the left image (viewed with the left eye) with the right image (viewed with the right eye). While this is much easier if you have two small magnifying glasses, one for each image (such as in the turn-of-the-century stereoscopes, or the more modern GAF Viewmasters), it is possible without them.

If you are having trouble merging the two images, try this: place the edge of a large card against the screen between the pictures, pointing towards your nose, to help isolate the images properly. Start with your eyes about 1 1/2 - 2 feet from the screen. If you wear glasses for myopia, remove them -- it will help you get close to the screen and keep your eyes relaxed.

The trick is not to go cross-eyed, but rather the opposite -- to let your eyes relax as if they were looking at a distant object.

These are only a small sample of the hundreds of stereo photos I've taken in the last few years -- they're just the ones I happened to have in print form (slides are not easily scannable).

Have fun!