Here is a link to a huge collection of Hugh Ferriss's eponymous illustrations.
Posted by Kosmograd on Flickr:
who has taken the time to assemble them into a fantastic slide show.
http://www.flickr.com/photos/kosmogr...7603512259334/
OR
See them from their original source at the Avery Online Library on
www.columbia.edu
http://www.columbia.edu/cu/lweb/indi...a/ferriss.html
however to view them there in a format larger then the thumbnails listed you will have to download a small plugin, which can be found on the same website.
If you want to see more of his work, but have a hard time getting access to his actual books I strongly recommend you give them a look.