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negative current

"Measuring the force," said Keely, "by vibrations, 18,000 of them to a second are necessary to raise that weight through the water. The current that raises the weight is of course a positive current. You see the copper globe remains suspended on the surface of the water. I turn on the negative current." [Pittsburg Dispatch April 07-1890]
Page last modified on Tuesday 29 of October, 2013 04:35:09 MDT

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