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“* M. Secchi on the Aurora of 1859. 397 
orinappreciable. This extraordinary current was the most in- 
tense on the longest wires. 
ll. Observations at Rome, Italy, (lat. 41° 54’), by M. Seccut; 
from the Comptes Rendus, T. XLIx, p. 847 and 458. 
On the 29th of August we hada superb aurora. The sky at 
ary position. After this the needle returned rapidly to the 
east, and at 7h 30 pointed 1° 23’ east of its mean position, thus 
escribing an arc of 4° 18’ in less than half an hour. This dis- 
turbance is the more remarkable, as the greatest range hereto- 
fore observed at Rome was only 45’ or 50’, 
‘The bifilar indicated a diminution of the horizontal component, 
amounting to 0-129, or about one-eighth of its mean value. 
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Tange of its scale. At 9p. M. the aan ie was more tranquil, 
and at midnight they had all returne 
Condition, 
