329 
1911-12.] On a Continuous-current Motor-G-yrostat. 
so long as the direction of the spin of the flywheel coincides with that in 
which the ring is being turned. If the direction in which the ring is 
being carried round is reversed, the gyrostat turns a somersault so as to 
Fig. 6. — Motor-Gyrostat arranged to show the principle 
of the gyrostatic compass. 
Fig. 7. — Motor-Gyrostat fitted np as gyrostatic pendulum. 
render the direction in which the armature is rotating coincident with 
that in which the ring is being carried. 
In the gyrostatic compass a heavy and rapidly rotating flywheel is 
mounted so that its axis is maintained horizontal by means of an elastic 
