Abstract
The apparatus to be described will permit the quantitative study of gyroscopic precession in an undergraduate laboratory. By suspending a rotating, magnetized, steel sphere on a jet of air and driving it as a synchronous motor by means of a rotating magnetic field, it is possible to eliminate, for all practical purposes, corrections for frictional losses in gimbal bearings. By using only a stop watch, micrometer caliper, and a simple stroboscope, an experimental error of 0.5% may be easily obtained. By suitable refinement of the equipment and techniques, an experimental error of 0.01% may be achieved.
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