Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
There probably aren't many photos out there of a steam tractor on a railcar on a boat on ice. Here we see two brand-new Buffalo-Pitts steam tractors on a flatcar aboard the transfer steamer City of Detroit on the Detroit River in winter. 8x10 inch dry plate glass negative, Detroit Publishing Company. View full size.