670 GBSERVATIONS ON TEE ZODIACAL LIGHT. 



No. 335. 



MOON ZODIACAL LIGHT. 

 MARCn 18th, 1854. 



Lat. 35 26' N-: Lon. 139 ' E. 

 Sun set 6A. 5m. 



f 9A. 46ni. 

 9A. 50m. 9 49 



9 54 Q ,, 



9 56 j [9 55 



Tlie sky at the eastward was clear, except a narrow cloud near the horizon ; and at 9 h 30 m I began to watch, to 

 see what the moon, now approaching the horizon,- would produce. There was at this time a singular paling of the 

 sky indeed, I think I may say a positive light within the dotted marks on the chart. I called one of the quarter- 

 masters, and asked him if he could discover a brightness along there, which he immediately did ; although when I 

 asked him to bound it, he placed it a little further to the north than 1 did. After a while the moon's Zodiacal Light 

 clearly commenced, and at 9 h 46 m , &c., I got the boundaries as in the chart. At 9 h 50, a Stronger Light began to 

 show itself decidedly, and I took its boundaries also at 9'' 54 and 9 h 56 m (see x y z). At 9" 57 m , the disc of the 

 moon began to show itself above the horizon. I notice that its light breaks bounds arid spreads quicker on the 

 right (or southwardly) than on the left. The streak of cloud did not interfere,, materially, with the observations. 



