Skyscrapers, Elevators, and All That

I've been interested in elevators and skyscrapers today (pretty obvious,isn't it?) - and on the chance that you're interested in the background of skyscrapers, and the combination of new technologies that made them possible, here are a few resources:

• "The History of Skyscrapers"
  (InfoPlease)
• "1885 First Skyscraper"
  (Chicago Public Library)
• "The History of Skyscrapers"
  (About.com: Inventors)
• "Skyscraper"
  (Wikipedia)
• "Skyscraper Museum"
  (New York)
• "The Sears Merchandising Tower
  vs. a Chronological History
  of Modern Era Skyscrapers"
  (an attractive and informative timeline with pictures - with a really boring title.)
  (a remnant, at another URL, of skyscrapers.com: Once a find website.)