192 OBSERVATIONS ON THE ZODIACAL LIGHT, 



No. 9fi. 

 JANUARY 2J, 1854 : EVENING. 



Lat, 22= is' if. : Lon. 114=> 10' E. 



Sim set 5A. 24m. 



Eastern Zodiacal Light at 11A. 30m. and midnight. Western Stronger Light 8h. 30m. Diffuse 8h. 30m. 



9 30 9 30 



in 30 

 Midnight 

 1 



Moon till about 8 h 30 m . At that hour got observations. The night remarkably fine, sky clear, atmosphere trans- 

 parent, no wind. At 9 h 30" 1 , the Stronger Light was dim, but I was able to get boundaries. At 10 h 30 m , it was gone; 

 11" 30"', boundaries same as at 10" 30 m . At 12 h (midnight), the Light was dim, but still distinct. Between a and 73 

 Arietis, along on the ecliptic, the Light was equal to that of the Milky Way adjoining Betelgucnx. At 11" 3CP, saw 

 also the Zodiacal Light in the east, for which see morning annotations, and also its boundaries in the evening chart. 

 At 12", the Light in the east and west was about equal. At 1 a. in., the western Light still visible, but scarcely to 

 be made out ; its boundaries as at 12 h . At l h 45'", nothing of it to be seen. It dies out; for the space below the 

 Pleiades, at, this hour, was free from haze quite to the horizon, yet was dark like the rest of the sky. 



