308 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 154. 



MAY 17th, 1854: EVENING. 



Lai. 41 47' N. : Lon. 140 43' E. 

 Sun set 7A. 9m. 



( 9A. Om. 



Stronger and Diffuse Light? 9 30 

 t 10 



Sky the same as last night. For the results, as accurately as I could get them, see the chart. The sudden ascent 

 of the Stronger Light between 9 h and 9 h 30 m , as there given, was owing to a greater clearness of the atmosphere at 

 the latter time, which was continued also at 10 o'clock. At 10 h 40 m , the haziness had spread once more, and nothing 

 of the Zodiacal Light was then to be seen. The sky, at 9 h 30 m and 10 h , was nearly or quite free from haze. 



