Here are some images from his book, which is available by Dover.  The book I have was printed in Munich and probably one of the best book purchases that I have made for $20. about 25 years ago.  Kley who lived during the late 1800's, has served as an influence to a good number of illustrators. His visual commentaries on the industrial revolution are brilliant.  This piece influenced me on the recent NYT piece that I posted.