336 Meteoric Qhservations of Nov. 13th, 1834. 



19th inst. and on the morning of the 13th, the number of observa- 

 tions and their duration was increased. 



Having witnessed the remarkable meteoric phenomenon of the 

 13th of November, 1833, and having been engaged during the sum- 

 mer, in conjunction with my friend Mr. Espy, in observing meteors, 

 I fek competent, as far as experience could render me so, to the task 

 which I had undertaken. The conclusions to which my observa- 

 tions have led, and in which I feel entire confidence, are, that at the 

 city of Philadelphia there occurred on the ISth of November, 1834, 

 no remarkable display of meteors of the kind witnessed in 1833, 

 nnd that there was probably no similar occurrence on those mornings 

 which were clear, just before and after the ISth inst. 



The observations upon which I base these conclusions are as follows. 



Sunday morning, Nov. 9, 3 A. M. at Holmesburg 10 miles N. 

 E. from Philadelphia, I observed the Zodiacal light which extended 

 as described (in the paragraph to which I have before.referred) from 

 the horizon, in an illy defined, nebulous light. The night was 

 cloudless, and the moon had set. Wind S W. 

 - Monday morning, Nov. 10, at Philadelphia. I observed at about 

 3 A. M. and again at 4 A. M., but there was a haze which obscured 

 the zodiacal hght. After the sun rose the sky clouded over. One 

 very brilliant meteor to the west at the time of the second observation. 



Tuesday, Nov. 11, was cloudy, and there was rain with the wind 

 at S W. 



Wednesday, Nov. 12, about 3J A. M., a low stratus occupied the 

 place of the zodiacal light. At 4 J A. M. the sky was clear and the 

 light brilliant, its general appearance as on Sunday. No meteors in 

 .S E part of the sky in 15 minutes. 



Thursday, Nov. 13, 12/i 10' A. M., air 41° Fahr. Dew point 

 37^° sky clear. No meteors. Wind N W slight. 



Ih 5' A. M. at the close of the observation. Air 40°, sky more 

 hazy to W. 



2A 40' a 2/i 55' A. M. Air 38J, dew point 35, sky very clear, 

 no haze. Three meteors in ten minutes looking to S E out of the 

 way of, the moon. Moon sets at 3A 49'. 



Sh 50' to 4A 10' A. M. Air 34°. The whole lower air is near 

 to the dew point, and therefore hazy. The zodiacal light is obscur- 

 ed. Seven meteors in fifteen minutes. Moon has set. 



5h 15' a 5h 30' A. M. Air 34° dew point 31° Twilight has 

 begun. Five faint meteors in half a minute, and then very rare. — 

 Three after those five in about fifteen minutes. 



