ON COMPAKING AND BEDUCING- MAGNETIC OBSERVATIONS, 



73 



Variation. Greenwich and Kew. 



THBEE TEAKS' 



Normal according to Sabine. 

 Wild. 



Normal according to Sabine. 

 Wild. 



Normal according to Sabine. 

 Wild. 



Normal according to Sabine. 

 Wild. 



Nonnal according to Sabine. 

 WUd. 



Normal according to Sabine. 

 Wild. 



Greenwich, Summer, three 



years' Means. 

 Kew, Summer, three years' 



(Sabine). 

 Kew, Summer, hree years' 



(Wildj. 



Greenwich, Winter, three 



years' Means. 

 Kew, Winter, three years' 



(Sabine). 

 Kew, Winter, three years' 



(Wild). 

 (Sum.), Sabine minus Wild. 

 (Win.), Sabine minus Wild. 

 Greenwich minus Sabine 



(Summer). 

 Greenwich minus Sabine 



(Winter). 

 Greenwich minus Wild 



(Summer). 



„ (Winter). 



