1867.] . 329 



meteors, made on the 10th of August, and the 14th of Novem- 

 ber last. 



Mr. Chase made some remarks on the same subject. 



Mr. Cresson called the attention of members to the re- 

 markable rise of the barometer on the 10th and 11th of Feb- 

 ruary, the highest point reached on the 11th a. m., being 

 31''20. 



He considered this great synclinal wave to be the indica- 

 tion of the approach of a northeast storm of unusual magni- 

 tude. Such a storm in fact set in within thirty hours after 

 the maximum barometer rise, and it has prevailed to the pres- 

 ent time, say for seventeen days, and does not appear to be 

 yet ended, as the barometer remains above the mean level 

 and easterly winds prevail. 



The storm is of unusual extent, commencing west of the 

 Rocky Mountains, and reaching nearly all latitudes in the 

 United States. 



Mr. Cresson stated that according to his observations, cov- 

 ering more than a quarter of a century, our northern storms 

 are always preceded by a rise of the barometer and a remark- 

 ably transparent atmosphere. After the centre of the storm 

 has passed, the barometer usually falls somewhat suddenly, 

 the wind veers to west and northwest, with cool and very dry 

 air. 



Every great rise of the barometer is not always the pre- 

 cursor of a northeast storm. Such a synclinal wave some- 

 times results from other causes, and is then accompanied by 

 extreme cold and dryness, such as would result from a down- 

 flow of air from a very high and cold region. An instance 

 of this kind occurred on the 7th of January, 1866. Thermom- 

 eter, 18°. Barometer, 31"10. 



Pending nomination Nos. 568, and new nominations Nos. 

 569 to 572, were read. 



On motion of Mr. Fraley, the Secretary was instructed to 

 furnish the Royal and National Library of the Kingdom of 

 Bavaria, at Munich, with a copy of the new series of the 

 Transactions, and the Proceedings. 



VOL. X. — 2t 



