After seeing Mr.Campbell's wonderful fresh diagrams, I sent him links about this past master. Harry suggested I post the links. So from Leif Peng's great blog about awesome classic illustration, here's some past diagram nervana, enjoy;

http://www.flickr.com/photos/leifpeng/432727691/in/set-72157600024625909/

http://todaysinspiration.blogspot.com/2009/05/frank-soltesz-remembered.html