226 Scientific Intelligence. 
may be anxious to attempt to elucidate this subject, that probably 
if they would consider all the conditions of the problem presented 
bad weather, the observations made by the English and Ameria! 
our knowle 
increase of knowledge generally comes a. necessity il 
no exception to this rule. A few years ago our science was 3 
fied with the terms prominences, sierra, and corona, to OPT 
2 0 
sverra was employed, and aptly so, when it was imagine of 
t ecg. 
the constituent materials of these strange things; we know that 
