[ 59 ] 



No. XI. 



Observations made on el Limar Eclipse at the Observatory in the City 

 of Philadelphia on the 2lst, of September 1801, by Mess. 

 Patterson, and Ellicott. 



Read Dec. 18th, 1801. 



The beginning of the eclipse, lhat of total darkness, and 

 the end of the eclipse, could not be observed on account of 

 clouds; but the end of total darkness was observed as below. 



End of total darkness as) h 

 observed by Mr. Patterson j 15 157 IP 



h ' « 



a's. limb began to emerge by ) ._ _ n . „ (at!5 13 33) 



i ° n J- Mr. Ellicott -J ,.,_,.. „_ J-ap. time 



2 s. limb emerged by ) (at 15 15 37) ^ 



The telescopes made use of were both achromatic, and mag- 

 nified about 70 times. 



No. XII. 



On the Hybernation of Swallows, by the late Colonel Antes. Com- 

 municated by Dr. Barton. 



Read May 17th, 1802. 

 Philadelphia July 9th, 1801. 



ABOUT 30 years ago, I was desired by Mr. Stettler, 

 who lived in Frederick Township, (at the time in Philadelphia 

 county,) to lay off a level for the purpose of leading the water 

 of a spring upon a meadow. — The exact year I do not recol- 

 lect, but am positive it was in the month of February. — I be- 

 gan where the stream entered his ground, and before I had 

 proceeded far I struck a hollow about a rod square which 



