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No. XXXVIII. 



Continuation of the Astronomical Observations made at Lancaster, 

 in Pennsylvania, by Mr. Andrew FAlicott. 



Read October 18th, 1805. 



& Note: — The eclipses of Jupiter's Satellites were all observed with an achromatic 

 telescope magnifying about 100 times. 



1804. March Wth. Immersion of the 2d satellite of Jupiter 

 observed at lV 9' 11" mean time, night clear. 



May l'3th. Emersion of the 1st satellite of Jupiter observed 

 at S* 30' 20" mean time, night clear. 



l 20th. Emersion of the 1st satellite of Jupiter observed at 

 10" 25' 14-" mean time, night clear; but from the proximity 

 of the moon to the planet, it is probable that the emersion was 

 observed 9 or 10 seconds too late. 



22^. Emersion of the 3d satellite of Jupiter observed at 

 9* 45' 50" mean time, night clear. 



June 5th. Emersion of the 1st satellite of Jupiter observed 

 at 8* 43' l", mean time, a little hazy. 



With. Emersion of the 1st satellite of Jupiter observed at 

 8 fc 5(i 5" meantime, a little hazy. 



July 4th. Emersion of the 3d satellite of Jupiter observed 

 at 9 h 37' 56" mean time, a little hazy. 



1805, January 1 4th. Observations on a lunar eclipse. 

 >'s limb began to be obscured at 13" 45' 42"} 



Indented at 13 48 V Mean time. 



Totally eclipsed at ... . 14 44 43 ) 



The end of the eclipse, and of total darkness, could not 

 be observed on account of a snow storm. 



April 30th. Immersion of the 1st satellite of Jupiter observ- 

 ed at 10" 54' 23" mean time, night clear. 



June 1st. Emersion of the 1st satellite of Jupiter observed 

 at 9 h 37' 19" mean time, night clear. 



2d. Emersion of the 2d satellite of Jupiter observed at 9 h 

 19' 3" mean time, night clear. 



26th. Observations on the beginning of a solar eclipse. 



The afternoon was remarkably clear and serene, but the sun 

 being low, his limb was very tremulous, though not so much so 



