40G OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 203. 



AUGUST 23d, 1854: MORNISS. 



Lat., at 3*., 16 0' N. : Lnn. 116 26' E. 



Sun rose at 5A. 49m, 



Stronger Light at midnight, 2/i. and 4/;. : Diffuse at midnight and 4 o'clock. 

 Sun's Lon. 149 58'. 



I wished to see at how early a time the eastern Zodiacal Light would show itself, and went on deck at midnight ; 

 but the Zodiacal Light had even then got the start of me, and was quite distinctly displayed. I took boundaries of 

 it, as given in the chart ; also, at 2 and 4 o'clock. At 2 1 ', though the Stronger Light may be said to have its limits 

 as marked for that hour, there was a much brighter part of it within the limits of the zigzag a a a the same as is 

 referred to in yesterday morning's record. But there was no sliding over of the Light this morning, as mapped 

 yesterday.* It is, indeed, difficult to say where the outlines of the Stronger Light are, for, from that brightness 

 within a a a, it dims off rather gradually till we reach the outer limits of the Diffuse Light ; and these are now so 

 indistinctly marked in the morning sky, that I sometimes hesitate about marking the boundaries of the Diffuse at all ; 

 but, though somewhat doubtful toward their upper end, they are not so at the lower ; and, by taking these to assist 

 as my guide along the sky, 1 made out to complete them as given in the chart. 



a 1856. A closer reference to the chart will show that there was, to some degree, though it was not so striking as on the 22d. 



