I love antique books. I am especially fascinated with the illustrations in these old books. I recently discovered a site named Vintage Printable. The owner of this web states;
One of my hobbies is curating out-of-copyright scientific illustration, now that there are so many digital image databases on the web.
I’ve taken care to ensure that the images collected here are either pre-1922, or else works created on behalf of the US government. It is my belief that there are no copyright infringing works here, but if anyone thinks I’m mistaken, please send me an e mail and I’ll remove the image.
The Vintage Printable site has hundreds of photos, prints and illustrations that are now in the public domain. The illustration above is from a children's book that was published in 1850. I am especially thrilled to find antique pictures of children reading books. This illustration could be used on a note card, book marker, etc.
If you are interested in hunting for public domain treasures, The Vintage Printable site is a great place to begin.