168 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 84. 



NOVEMBER 5th, 1853 : EVENING. 



Lat. 220 23' N.: Lon. 113 32' E. 



Sun set 5h. 17m. 

 Stronger Light at 9A. Om. Diffuse 9/>. Om. 



10 10 



11 



Sun's longitude 223 1'. 



Clouds in the morning. Moon this evening set a little before 9 b ; got observations from that time on. Evening 

 clear and good for work. Worthy of notice, how, as the evening advances, and the ecliptic increases its angle, the 

 Light shoots upward, narrowing its cone. At 12 h , the ecliptic is nearly perpendicular to the horizon. 



At ll h , the Diffuse Light seemed to have the same boundary as at 10 h , but I could not determine reliably. Thought 

 that the Stronger Light could be made out till 11'' 30 m ; by which time, however, it had become so low down, and so 

 mixed with the whiteness at the horizon, that I could now no longer speak of it with certainty. The existence of the 

 Diffuse Light at IP 30 m , could also not be affirmed with certainty. 



