310 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 155. 



MAY 19th, 1854: EVEMNG. 



Lat. 41 47' N.: Lon. 140" 43' E. 



Sun Set 7h. llm. 

 Stronger and Diffuse Light at 9 aud 10 o'clock. 



Clouds last evening. This evening cloudless, but still a haziness in the sky. At 8 h 45 m , could see the Zodiacal 

 Light distinctly ; but I could not get boundaries till 9 o'clock. Even then, the limits both of the Stronger and Dif- 

 fuse Light were ill defined. At 9", the Light was pretty strong up as far as Castor and Pollux. At 10 h , it was all 

 very faint, and I had great difficulty in getting boundaries ; think, however, that those in the chart for that hour 

 are tolerably reliable. At 10 h 30 m , there was nothing distinguishable. 



