I found this site of old magazines: National Geographic's,
Scientific American, Technology Review, Popular Electronics, Popular
Science, Modern Mechanix, Mechanix Illustrated, and a few semi-smut
magazines

Dates range from 1910-1980 or so, some 300 total

Not every issue of every mag - some aren't well represented. But the
neat thing is the pages are copied for reading.

http://blog.modernmechanix.com/covers The magazine covers (takes time
to load)

http://blog.modernmechanix.com/2007/...ball-bearings/

DIY: "Harmless Steam Cannon Shoots Ball Bearings"

http://blog.modernmechanix.com/2006/...&Qis=XL# qdig

Build your own "Geiger gun"

http://blog.modernmechanix.com/2007/...tte-dispenser/

DIY cigarette dispenser
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