The Union Pacific displayed its mammoth 4-8-8-4, "Big Boy" No. 4022, at the 1949 fair. Mr. O'Connor had to take two slides to capture the full length of the locomotive, but here we have spliced them into a single image and also converted the faded color transparency to black-and-white. For more about these massive engines, visit our "Big Boys" site showing photos of them in service in 1957.