378 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 188. 



JULY 24th, 1854: EVENING. 



Lat. at 8A., 25 33' N : Lon 120 39' E. 



SUD set (iA. 46m. 

 C 8A. Om. ) ( 8/1. 15m. ) 



Stronger Light at { 8 15 V ? 8 45 > Diffuse. 

 ( 8 45 ) ( 9 45 ^ 



Sky clear. At 8 o'clock the Zodiacal Light was quite distinct at its lower end, as in chart ; but the night had not 

 yet deepened sufficiently to show it further up. As the darkness increased, it ascended rapidly ; and at 8 b 15'" the 

 boundaries were as given for that hour in the chart. It seems to be brightest at about 8 h 45. The Diffuse Light 

 is strongly marked, and I noticed again the contrast in intensity between the present evening and morning Diffuse 

 Light. At 9" 45 m I could define this latter well, but could not get boundaries for the Stronger. The latter appeared 

 to have melted gradually into the Diffuse. 



