Edison did *not* promote AC over DC, Edison sold DC systems and
appliances.   Nikola Tesla invented the AC (or poly phase) system early
on.   Later Nikola worked briefly for Edison and was fortunate that
Edison did not comprehend his new ideas.   Although Edison appreciated
Tesla's work on repair of his DC machines there were profound
differences between Edison's grasping type philosophy and Tesla's
intuitive higher understanding of physics possibilities.   Tesla later
worked with Westinghouse's backing and not only perfected the AC system,
he also invented radio control, resonance theories, fluorescent lighting
and many other devices.   Tesla has been described as "A man out of
time" and I would translate this as meaning a extremly gifted inventor.
Edison ran the electrocution demos to "prove" that AC was more
dangerous, not suprisingly the contrary was true and so he rigged the
demonstrations to dishonestly implicate AC.


regards,
Graham Daniel.

Kevin Allenzovic wrote:
>
> This sounds a little impossible as AC would alternately contract and release y
our muscles forcing you to release it! This is one of the reasons we have AC sup
plied to our home and not DC, among ather obvious reasons.
> Edison pushed for the use of AC by demonstrating on a horse. He'd fist hit it
with AC and watch it bolt. When caught he'd again shcok it with DC killing it st
one dead.

--
Steam engines may be out of fashion, but when you consider that an
internal combustion engine would require recovery of waste heat by
transfer just before top dead centre then fashion becomes rather
redundant, USE STRATIFIED HEAT EXCHANGERS ! and external combustion.

You heard it first from: Graham Daniel, managing director of Electronic
Product Enhancements.
Phone NZ 04 387 4347, Fax NZ 04 3874348, Cellular NZ 021 954 196.