258 



OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 129. 



MARCH 25th, 1854: EVENING. 



Lat. 35 26' N. : Lon. 13i) 42' E. 



Sun set 6A. I Im. 

 Stronger Light 7A. 30m., &c., to 9/i 30m: Diffuse 7/i. 45m. 



Clouds since last, till this evening, which was very clear. Watched for the first appearance of the Zodiacal Light. 

 Sun sets at 6" ll m At 7' 1 10"' no sign of Zodiacal Light yet ; Milky Way also not yet distinguishable : 7" 25 m , now, 

 for the first time, the Light decidedly showing itself, as also the Milky Way ; does not yet give reliable boundaries. 

 7" 24"', could now get boundaries at the lower, but not at the upper end ; 7" 30'", got boundaries of Stronger Light, 

 and at 7' 4.V 1 of the Diffuse. At 7'' 35'" Stronger Light was at b, and bright ; its uppar end seemed to extend into 

 the Milky Way ; but ot this I could not be certain. 



h. m. 

 At 7 50i, at b, and very bright. 



^ 0, the upper end of the Stronger Light now clearly 

 exten Is into the Milky Way ; perhaps a little 

 beyond it. 

 8 5, Stronger Light now brighter than at any time 



previously this evening. 



8 22, still very bright. After this, it seemed to dim 

 a little. 



40i, 



* 



(. m. 



At 7 37, still at I, and bright. 

 7 39, at a, and dim. 

 7 40, do. aud quite dim. 

 brightening. 

 * (Changes apparently, but could not be cer- 



tain of them.) 

 7 43i, at a, and now dim. 

 7 46, at b, and bright. 

 7 47i, do. do. 



Sometimes these changes seemed to be very evident, sometimes so dubious that I felt reluctant to record them. 

 I give the notes, however, as they were made at the time. 



At 9' 1 30, the Stronger Light was evidently above the Milky Way ; its outlines are in the chart, marked c c. 

 At 10 h 20 the Stronger Light still visible, but so indefinite that I cannot bound it. 



