The images in the collection were classified by wheel arrangement by Mr. Schenzinger. You may also access the collection by road name without the descriptive text. The common name for each wheel arrangement is used here, although different roads had different names for their locomotives. The Milwaukee Road, for instance, called their 4-6-4s Baltics rather than Hudsons; the C & O called their 2-8-4s Kanawahs rather than Berkshires. The descriptive information included with each image is mostly from the colletor's original photo album. As indicated in previous text, I have added some minor corrections and added some information for photos that had no comments.

Wes Barris has a write up on the Whyte system of locomotive wheel arrangement classification.