Mike Carrell wrote:
there. Batteries have been dated to ca. 200 BC, but no envidence that anyone
brought a current carrying wire near a compass until the 1700s.
Yes, apparently they were used for therapy, like massage. Modern doctors
have found low current helps some patients.
There are ancient
Mike Carrell wrote:
Most of Edison's inventions could have been built anytime in the Iron Age
by someone who knew what to do.
I think that is somewhat exaggerated. Edison's improved stock market ticker
and his phonograph required precision parts and advanced metallurgy that
were not available
Jed wrote:
Mike Carrell wrote:
Most of Edison's inventions could have been built anytime in the Iron Age
by someone who knew what to do.
I think that is somewhat exaggerated.
Sure, it's a bit of hyperbole, to stir discussion. I read a piece on the
Internet about the Antikytheria mechanism,
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