J. G. Barnard on the Gyroscope. 



67 



an intensity and upward direction adequate to neutralize the 

 doAvnward action of gravity ; but the acquired downward velocity 

 still exists and the axis still descends at the same time acquiring 

 a constantly increasing horizontal component, and with it a still 

 increasing upward deflecting force. At length the descending 



Fig. 3. 



^ 



component of velocity is entirel}" destroyed — the path of the 

 axis is horizontal ; the deflecting force due to it acts directly 

 contrary to gravity, which it exceeds in intensity, and hence 

 causes the axis to commence rising* This is the state of things 

 at the point h (fig. 2). The axis has descended the curve ah^ and 



