The Erie Railroad Glass Plate Negative Collection Using the Collection The collection of 709 images can be accessed via the Library's CONTENTdm server and is fully searchable by keyword, subject, and image number. The item level inventory of the collection in Excel can help with formulating searches and sorting. NOTE: both links will open new windows. About the Collection The Erie Railroad Company glass plate negatives are arranged by Erie subsidiary railroads in the states of New York, New Jersey, Pennsylvania, and Ohio. Mainline scenes come from all of the preceding states, as well as from Indiana and Illinois.