43 G OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 218. 



SEPTEMBER 20th, 1854: EVENING. 



Lat. at 8k., 33 27' N. : Lon. 137 40' E. 



Sun set at bh. SG^ro. 



Stronger Light at 7h. lorn, and 7k. 45m. : Diffuse 7/i. 20m., 7h. 45m., and 8k. 30m. 

 Zenith point at 7k. 20m , Lat. 54 50' N. : Lon. 299. At 8A. 30m., Lat. 50 20' N. : Lon. 323. 



Sky good for observations, except a few thin clouds along the horizon, just over the sun. Got boundaries at 7" 

 15 m , which I believe may be relied on ; but the Stronger Light, within the old boundaries, was dim for it. At 

 7" 45 m this Light, within the old bounds, stronger than before, and well defined; while the light below a a has faded, 

 except above b b; but whether thin clouds may be intervening, and so may produce this latter result or not, I 

 cannot tell. 



Last evening, though I could get no full boundaries, I still was able to catch glimpses of the Light here and 

 there ; and, towards S' 1 , 1 thought that the Diffuse Light could be seen across the Milky Way. Mr. G- was sitting 

 with uie, and, on my drawing his attention to it, he saw it also. This evening I gave particular attention to it, and 

 the result is in the chart. The evening Diffuse Light is now very strong, and strengthens as the night advances, 

 to a certain period ; but still this boundary across the Milky Way may have some doubts attending it, on account of 

 the brightness of Jupiter, which planet is now within these bounds. At 8 h 30 m all was gone except the Diffuse 

 Light, which was still quite distinct. 



