appears to subsist between it and the Formation of Clouds. 21 



cularly of the cirrus and cirrostratus types, are submitted to the 

 consideration of meteorologists, in the hope that the various 

 points of inquiry involved will receive a more general and system- 

 atic attention than they have hitherto obtained. A highly inter- 

 esting connexion has been recently discovered between the varia- 

 tions of the solar spots and those of the terrestrial magnetic 

 forces. The latter have been long known to be influenced by 

 the aurora, and this phenomenon now appears to have the power 

 of affecting in a very decided manner many of the meteorological 

 processes of our atmosphere. A most interesting field for obser- 

 vation is thus opened up, the investigation of which promises to 

 lead to very important results. 



I. Aurora. 



1. Table showing the Distribution of Auroral Displays with regard 

 to dates or periods of the year, — 1838 to 1847 inclusive. 



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