The only surviving steam locomotive of the Chicago & Illinois Midland is No. 551, one of three 2-8-2s of class F-4 delivered by Lima Locomotive Works in 1928. They had cylinder dimensions of 26x30 inches, a boiler pressure of 200 p.s.i., and 63-inch drivers. They produced 54,700 pounds of tractive force and weighed 138 tons. They had a grate area of 67 square feet and an evaporative heating service of 3502 square feet. Today No. 551 is at the Museum of Transportation in suburban St. Louis, where I took this photo on July 12, 1990.