The picture above is a cotton gin in Mississippi. Click on the picture to enlarge it.
The link below is to a treasure trove of information and photographs about Historic Preservation in Mississippi.
http://misspreservation.com/author/schoolfinder72/
Flickr photos.
http://www.flickr.com/groups/misspreservation/pool/with/5405128783/
Here is another good page from this source.
http://misspreservation.com/2010/04/29/wpa-guide-to-the-magnolia-state-depression-is-great/