Truly an exciting day for public domain imagery! I thought LOC on Flickr was amazing. But now Babara Mathé sent me THIS:
The National Museum of Health and Medicine has been uploading pictures to Flickr since September 2006. We've transcribed, of course, all information that we have for each picture, but have also been posting some for which we have relatively little information, such as LC is doing, with the hope that a Flickr user will recognize them and be able to tell us more.
We've been uploading the hard way, mostly one picture at a time, choosing from among the several hundred thousand we've been digitizing over the last three years. Until that database goes live, this is our way of sharing our favorite photos from our many collections.
You can see our photos at:
This is my favorite link: "Favorites of the Archive Staff;" All images here taken from that image set. Many more gems to be found there, as at all the links. I encourage you to check them out for yourself.