The M&StL was an early adopter of the internal-combustion engine, having acquired gas-electric passenger cars in 1929-31. In the late 1930s, it purchased EMC, Alco and Baldwin switchers. World War II prevented the M&StL from further dieselizing, but as the war neared its end, it bought EMD FT's and Alco RS-1's. The RS-1's were unique in that they were painted in ten different schemes. Dieselized in 1951, it added EMD SD-7's for helpers in Peoria to climb out of the Illinois River valley and GP-9's for road service in the mid-1950s, along with Budd RDC-4's.
The 91 images come from slides, negatives and prints. Images include locomotives, freight cars, calendar art, artifacts and more. The time period ranges from the 1920's to the 1950s. The presentation is like looking through a book on a computer. The CD-ROM works in PCs (WIN 2000/XP/Vista/7) and Macs and is self-starting. Photographs can be printed out.