Unit of Acceleration

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IT is a little surprising to find in Dr. Shaw's paper (December 16, 1913), “. . . He (Mr. Whipple) points out that we have no special name for the unit of acceleration.” In NATURE of June 25, 1914, Mr. Whipple proposed the name leo. So long ago as 1909 Wiechert used the term “gal” in the report for the Göttingen earthquake station for that unit, being the first syllable of Galileo, whence Mr. Whipple derives his “leo.” Others, as well as myself, have used “gal,” or rather “milligal,” in analyses of earthquakes. A milligal is approximately a millionth of g. Dyne is the unit of force, gal the unit of acceleration.

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KLOTZ, O. Unit of Acceleration. Nature 93, 611 (1914) doi:10.1038/093611d0

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