Annual Variation of the Diurnal Components a^ 



(Fig. 11 to 18 show the deviation, from the mean value given in Fig. 10). 



Fig. 10. 



Mean of 10 stations. 



inniTTflïowKîsai 



Fig. 11. 



Aberdeen. 



•10 



•05 







-05' 



-•10 



-.15 



Fig. 14. 



Liverpool (upper) and Stonyhurst 

 (lower). 





 -05 



Fig. 1.5. 



Greenwich. 



Fig. 12. 



Oxford. 



Fig. 13. 



Armagh (upper curve) and 

 Glasgow (lower). 



Fig. 16. 



Kew. 



•10 





 -05 



Fig. 17. 



Falmouth. 



Fig. 18. 



Valencia. 



