OBSERVATIONS ON THE ZODIACAL LIGHT 



No. 263. 



DECEMBER 21st, ]854: MORNING. 



Lat. at 4h , 25 5-' N. : Lon. 114 48' W. 

 Sun rose at 6/1. 47?. 



( uitilnigh 

 t- ~l/t. I'm. 



Stronger Light at- ~l/t. I'm. > Diffuse at 4 o'clock. 



M ^ 

 Sun's Ion. 269 3 21'. 



Was on deck at midnight, and found the Zodiacal Light over both west and east horizons distinct, and easily 

 made out at that hour. At that hour the ecliptic is now nearly perpendicular to the horizon. The sky at ]2 h was 

 favoiable for observations; but at 2' 1 I had to contend with parsing clou-Is, between which, however, I succeeded in 

 getting reliable boundaries. The same cause interfered at 3' 1 30'", and I was n:>t successful in getting the full out 

 lines till 4 o'clock. On deck again at 5 h , but found the sky so obscured by clouds, that no reliable results could be 

 procured. 



Clouds prevented my bounding the Diffuse Light till 4\ I noticed that the effulgent Light, marked by the 

 zigzag, began to show itself about 4 o'clock. 





