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On An Experimental Illustration of Minimum Energy 2


    THIS illustration consists of a liquid gyrostat of exactly the same construction as that described and represented by the annexed drawing, repeated from NATURE, February 1, 1877, p. 297, 298, with the difference that the figure of the shell is prolate instead of oblate. The experiment was in fact conducted with the actual apparatus which was exhibited to the British Association at Glasgow in 1876, altered by the substitution of a shell having its equatorial diameter about 9/10 of its axial diameter, for the shell with axial diameter 9/10 of equatorial diameter which was used when the apparatus was shown as a successful gyrostat.

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