
Tech stuff
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Refining Edge-Lit Holiday Cards
This is a fascinating piece of railroad steam engine history and loaded with tons of physics. Why did the Henschel V-8 steam locomotive disappear? It looks like a good idea.
Henschel V-8 steam locomotive--doomed
Using slow motion video Bill Hammack shows how the mechanical digital-to-analogue converter of IBM's revolutionary "golf ball" typewriter works.

