Report of the Kew Committee. 



Vibration Observations for Absolute Measure of 



Table I. 



475 

 Horizontal Force. 



* A vibration is a movement of the magnet from a position of maximum displace- 

 ment on one side of the meridian to a corresponding position on the other side. 

 t m = magnetic moment of vibrating magnet. 

 VOL. XXXVII. 2 I 



