Plate XVI. 



April 5-6, 1903. 



I754' 



Christchurch 



Declination 

 (EasC) 



Christchurch. 

 Horizontal 

 Force. 



Mauritius 

 Horizontal 

 Force. 



Col aba 



Horizontal 

 Force. 



FaL mouth 



Horizontal 



Force. 



Fal mouth. 



Declination 



(West) 



IIRM. 12 IA.M. 23456 



Disturbance of April 5 and 6, 1903, at Co-operating Stations. 



