This is an ink drawing of an abandoned coal sifting plant from a great set of photos I found on Flickr of old machine shops. The original photo is still up at http://www.flickr.com/photos/andrewjbacha/6535484845/in/faves-32535921@N08/ if anyone is interested in doing a comparison and pointing out all of the inaccuracies. I've been doing a lot of figure drawing lately and it was interesting to step away for that and draw something with straight lines.