The left and right eye images are presented side-by-side and transposed. Click on the appropriate box for the desired image size (depending on your screen resolution). Converge your eyes on a point closer than your computer monitor, until the two images fuse and appear in 3D (flanked by two non-stereo images which you should ignore). When trying this for the first time, it is helpful to focus on the tip of a pencil which you can move back and forth between your head and the monitor until the images fuse. A little practice and it becomes easy.
The images are presented in interlaced format, where left and right eye views are presented in alternate frames. To view these, you must have a set of SimulEye glasses available from the Stereographics Corporation.