Thought this was rather cool, it's searchable and even has the ads.
http://www.popsci.com/archives
PopSci, the web-wing of Popular Science magazine, has scanned its entire 137-year archive and put it online for you to read, absolutely free. The archive, made available in partnership with Google Books, even has the original period advertisements.
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http://www.wired.com/gadgetlab/2010/...#ixzz0hJbOdjFk