138 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 69. 



OCTOBER I9th, 1853 : EVENING. 



Ut, 22' : ' 11' N. : Lon. ll.'i-' 36' E. 

 Sun set 5A. 28Jm. 

 Diffuse Light at 7/i. 



Evening pretty favorable for Zodiacal Light. Sme cirri prevented my getting the Stronger part. Was gratified 

 in being able to get the Diffuse lieyoml the Milky Way. These evening observations are still particularly interest- 

 ing, as tlio sun still strikes laterally; and consequently they help us to ascertain the breadth of the Zodiacal Light 

 northwardly. Watched to see when I could first make it out to be the Zodiacal Light: it was so first, decidedly, at 

 6" 3fl m . Moon rose at I 7" 15. In the chart the boundary is double, at its lower end, on the left. My eye sometimes 

 fixed on one, sometimes on the other, as the true boundary. I could not decide which of the two lim.-s to adopt. 



