Re: 25 Hz Power

> Boston Edison used to provide 600 volt DC service for the operation of

>> elevators and cranes. I don't know if they still do. > I know Milwaukee, WI had DC available at some point in the distant past. I > used to have a water cooler with a DC motor from downtown somewhere. > Upper Michigan had 25Hz (cycles/second at the time) at a number of > copper mining operations, if memory serves. >> Tom Horne >> "This alternating current stuff is just a fad. It is much too dangerous >> for general use." Thomas Alva Edison > Herb Stein > > [TELECOM Digest Editor's Note: A water cooler with a DC motor is > interesting; but did you ever see a _refrigerator_ powered by -gas- > rather than -electricity-? I had one of those in a long since for- > gotten apartment in Chicago back in the 1960's. No motor of course, no > compressor, etc, but it was a refrigerator, freezer, etc, and I think > (cannot remember for sure) it was manufactured by 'Frigidaire > Company'. Totally silent of course. I have no idea how it worked; if > I ever knew, I have since forgotten. PAT]

I'll have to make a phone call, but I think a friend of mines girl friend has a gas air conditioner at her house in Farmington MO. I'll have to get back to you on that one.

Herb Stein

[TELECOM Digest Editor's Note: I have also seen 'air conditioners' which have a position on the switch to put out heat (as well as the usual two or three cool air positions.) PAT]
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Herb Stein
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