On the Meteors of ISth JVovember. 401 



Review of the foregoing Facts. 



1. The change of weather which took place about the time the me- 

 teors appeared, was very remarkable both for its amount and for the 

 extent of country which it pervaded. Some additional facts have 

 come to our knowledge since those mentioned on page 385, were put 

 to press, which give much interest to this head. Such are the fol- 

 lowing. 



The change of temperature at Mobile, Alabama, (Lat. 30^ 40'y 

 Lon. 88° 11',) is thus described in a communication from Alexan- 

 der Jones, M. D. addressed to Professor Silliman. 



" For several days before, the weather had been unusually warm 

 for the season, the wind prevailing from the S. S. W. On the 11th, 

 a shower of rain fell ; on the 12th, the wind changed to N. W. The 

 thermometer, for several days previous to the night or morning of the 

 13th, stood as high as 80° F. On that night it fell down to about 

 40°. For two weeks afterwards, we had the severest spell of con- 

 tinued cold weather ever experienced in Mobile, at the same season 

 of the year." 



The reduction of temperature extended as far westward ^sJVatch- 

 itoches in Louisiana, (Lat. 32°, Lon. 93°,) as we learn from Dr. 

 Leavenworth of the U. S. Array, who is stationed near that place. 

 He says " the night, although not cold, was much cooler than the 

 preceding ones had been." 



It appears however by a communication from Mr. A. Mallory 

 addressed to Professor Silliman, that the change of weather was hard- 

 ly perceptible at Matanzas in the Island of Cuba, although the me- 

 teoric appearances were much the same there as here. Mr. Mallory 

 observes that "there was nothing singular in the appearance of the 

 atmosphere either before or after the 13th, the thermometer ranging, 

 from 77° to 84° on the 12tb, and from 75° to 82° on the 13th, 

 with a pleasant sea breeze and a clear sky. The barometer at suw 

 rise stood at 29.90" 



But for the most remarkable statements on this bead, we are in- 

 debted to Mr. Twining, (see p. 399.) It appears that about the 

 time under review, there was, in a certain part of the Atlantic Ocean, 

 between the latitudes of 40° and 50° N., and the longitudes of 30°' 

 and 50° W., a violent gale of wind. The conclusion of Mr. Twi- 

 ning, that the reason why no meteors were seen eastward of the 

 fiftieth degree of west longitude, was because the sky was obscur- 

 ed, is strengthened by the fact, that a little westward of this limit. 



Vol. XXV.~No. 2. 51 



