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>An Electromagnetic Method of Detecting Minute Irregularities in Curvature of Spheres and Cylinders and of Controlling the Oscillations of a Mass of Metal Suspended by Means of a Torsion Fibre
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An Electromagnetic Method of Detecting Minute Irregularities in Curvature of Spheres and Cylinders and of Controlling the Oscillations of a Mass of Metal Suspended by Means of a Torsion Fibre