Disturbances of Magnetic Declination in the Keiv Observatory, 317 



Mean Diurnal Disturbance Variation of the Magnetic Declination. 

 Figs. 1 and 2, Kew and llobarton. Fig. 3, St. Helena. 



Local Astronomical Hours. 

 18 19 20 21 22 23 1 2 3 i 5 6 7 8 9 10 11 12 13 1-1 15 16 17 18 



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Fig. 1, 



Kew. Westerly Deflections. 

 *•— . »•• Ho,;)arti;)n> Easterly Deflections. 



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Fig. 2. 







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___„ Kew. Easterly Deflections. 













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18 19 20 21 22 23 1 2 3 4 5 6 7 8 9 10 11 12 13 11 15 16 17 18 

 Local Astronomical Hours. 





Local Astronomical Hours. 















6 7 8 9 10 11 12 13 14 15 16 17 18 19 



20 21 



22 23 







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2 3 



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5 6 



2-5 





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Fig. 3. 

 St. Helena. Westerly Deflections. ' 



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6 7 8 9 10 11 12 13 14 15 16 17 18 19 :0 21 22 23 1 2 3 

 Local Astronomical Hours. 



