fiOO OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 300. 



MARCH 13th, 1855: EVEMSS. 



Lat. -2-2 55' S. ! Lon. 43 6' W. 

 Sun set at GA. J5mi 



f "A. 30m. 1 



Stronger Light at { 8 V Diffuse at 7/i. 30 m . and 8rt. 

 ^ 8 3D ) 



Clouds ever since last date (1st), until this evening. Sky this evening clear, and favorable for observations. The 

 Zodiacal Light showed itself about 7" 10 m ; but I did not get reliable boundaries till 7" 30. At 7 h 45'", it was very 

 bright. At 8" 45, the right-hand boundary of the Stronger Light appeared pretty clearly to have slid over (as in 

 the chart), similarly to that on the left ; but I will not speak confidently of this, as it had then sunk considerably 

 towards the horizon. At 8 h SO 1 ", the Stronger and Diffuse Light seemed to have merged considerably into one ; and 

 it was difficult to get any boundaries for the former. I have given its upper boundary as it seemed to me for that 

 hour ; the lower one appeared to be as at S' 1 . At 9" 30 m , the Zodiacal Light was still visible (though dim) below the 

 Milky Way, and seemed to show itself above this also ; but it did not give any reliable boundaries. 



