CIS OBSERVATIONS ON THE ZODIACAL LIGHT 



No. 309. 



MARCH 23d, 1855 : HOKNIXG. 



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



Sun rose fi/i. '.!/. 

 ( 3/i. dm. i 



Stronger Light at-' 4 > Diffuse at 3 and 4 o'clock. 

 (4 30 ) 



Clouds yesterday morning. Sky this ,1. m. very fine for observations. At 3", the Zodiacal Light, though distinct, 

 was rather dim, but gave reliable boundaries; though, on the right, or southward, it was difficult to get those of the 

 Stronger Light, since it passed so gradually into the Diffuse. So, also, afterwards. While looking at it, I thought 

 that at about 3 h 20"' it suddenly brightened. Was on deck again at 4'' : sky good, and Light very bright. But at 

 4' 1 22"', it seemed to become much dimmed, and to contract its limits: at 4" 28'" it was again very bright. Against 

 these last two changes, I entered on my record, made at the time, "no doubt of this." At 4'' 30 m it was extremely 

 bright. 



