Gyroscopes; various.

Various Gyroscopes. Large Gyro in a pair of gimbals. Gyro-stabilized 'boat' mounted on rockers. When the curved bar is attached to the gyro, the boat rocks. When the bar is loosed from the gyro, the gyro slows the boat's rocking. J.J.Thomson's gyro to show precession. Speed Controller must be used with the gyro-spinner.