672 OBSERVATIONS ON THF ZODIACAL LIGHT. 



No. 336. 



MOON ZODIACAL LIGHT. 



MARCH 21st, 1854: Just after midnight. 



Lat, 35 26' N. : Lon. 139 42' E. 



r*o fj?- 



Stronger Light at i 16 > Diffuse I ,r 



I 20 j 18 



Eose at midnight, to watch for the moon's Zodiacal Light. At 12 h 8, the eastern sky began to exhibit a flush ; at 

 12 h 10 m , got boundaries ; and thence on to 12" 19 m , as in the chart ; at 12" 12i m , 12" 16 m , and 12" 20, took bounda- 

 ries of the Stronger Light ; 12 h 20 m , the moon's disc showed itself in some haze along the horizon. The sky was 

 very favorable ; and although the moon was now entering her last quarter, and her light was m>t at the strongest, 

 still the Zodiacal Light was very distinct and strongly marked. The observation was extremely interesting, on 

 account of the moon's distance from the equator, and also the great obliquity of the ecliptic to the horizon. Had 

 this light been merely a reflection from the atmosphere, its highest point would have been in a very different direc- 

 tion (up towards Arcturus) from what it was. 



