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SCIENCE NOTES: BIG DYNAMOS NOW RUN IN HYDROGEN MEDIUM; Lower Resistance Adds Efficiency in Conversion of Energy--Surveying the Ocean Floor by Sound Surveying the Ocean by Sound. Ping-Pong Balls as Buoys. A Paradox of Speed.

'SCIENCE NOTES: BIG DYNAMOS NOW RUN IN HYDROGEN MEDIUM; Lower Resistance Adds Efficiency in Conversion of Energy--Surveying the Ocean Floor by Sound Surveying the Ocean by Sound. Ping-Pong Balls as Buoys. A Paradox of Speed.', New York Times

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