I just spent the last half hour or so (probably more) browsing The Making of Modern Michigan image library online. The project which brings a ton of old archive images of Detroit to the digital realm is funded by the Institute for Museums and Library Services with participation from a number of Michigan-based libraries. A lot of treasure in this one website along. Here are a few I pulled of the Packard Auto Plant which reminded me that I need to post my images online.
Click inside to see the images.