60 



On the late Exceptional Season. 



extent is manifest nearly throughout that period, compara- 

 tively few days only being quite free ; the vibratory 

 movement of the declination, and in a smaller degree of the 

 horizontal force also, which mostly takes place during the 

 summer months, and which occurs generall}^ towards 

 midnight and also towards sunrise, being particularly 

 conspicuous by its frequency and extent from November, 

 1869, till the beginning of April, 1870 ; from June and 

 during the winter months the extent of the disturbances 

 decreased, and were even comparatively small, until August 

 when they again became more frequent. 



The greater disturbances, which are of the nature 

 geneially accompanying auroral light, occurred on the 

 following dates (of which sample papers are given) ; the 

 dates upon which auroras were actually observed are also 

 given. 







o S 









IS 





Year. 



Month. 



II 



Auroras. 



1870 



Jan. 



3 



4 

 8 









Also reported by Mr. Todd, of Adelaide, as a 









fine display. 





Feb. 



1 



10 

 11 



Visible from 8 to 10 p.m. ; sliortly after 9 p.m. 

 some magnificent streamers. 





Mar. 



20 

 21 







April 



5 



Visible all tbrougb tbe evening ; at times very 







6 

 22 



brilliant, and particularly at 10.30 p.m. 













23 









28 







May 



16 









20 



Faint only ; at 10.30 showed more distinct. 





June 



13 



14 

 16 

 17 







July 



5 



28 







Aug. 



3 



7 





