Abstract
A VERTICAL needle of iron suspended in vacuo by the co-axial field of a solenoid theoretically may have infinitesimal frictional torque against axial rotation. The purpose of the present note is to report an observed value of this frictional torque.
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References
Holmes, F. T., Phys. Rev., 51, 689 (1937).
Reported by F. T. Holmes at meeting of the Va. Acad. Sci., May 7, 1937.
Beams, J. W., Weed, A. J., and Pickels, E. G., Science, 78, 338 (1933).
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HOLMES, F., BEAMS, J. Frictional Torque of an Axial Magnetic Suspension. Nature 140, 30–31 (1937). https://doi.org/10.1038/140030b0
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DOI: https://doi.org/10.1038/140030b0
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