Ask me to name the precursors of Dieselpunk and Hugh Ferriss will be one of the first names on my list.
There's already an article about this genius delineator, accompanied by a small album. Now Paul Malon's excellent Flickr photostream brings us more high-quality scans of Ferriss' graphic artwork.
Skycraper Hangar in a Metropolis
Skyscrapers Spanning Streets
The Metropolis of Tomorrow, 1929
Canyons Of Commerce, 1929
Chanin Building, 1929
The Chicago Board of Trade
The Master Building
Empire State Building, 1931
Chrysler Building, 1930
To serve a pleasant reminder: the largest Ferriss online gallery (341 images from Avery collection) is here. Once copy-protected, it's now public and download-enabled.