42 OBSERVATIONS ON THE ZODIACAL LIGHT, 



No. 21. 



JPLT 2d, 1853 : EVENZNO. 



Lat. 26=> 10' N.: Lon. 



Sun set 6/1. 5Hm. 

 Diffuse Light at 9A. 30m. 



Clouds in the early part of the evening. At 9 h 30 m had an observation. Darkish clouds soon began to cross this 

 space, which, by contrast, gave me a better opportunity than before of judging about the newly observed appear- 

 ance within the outer or dotted lines, and tended to confirm the belief that it is real. Clouds prevented further 

 observations. 



[P. S. 1856. This reduced chart would not admit the whole of the dotted line as given in my original observa- 

 tions. This line reached 52 lat. at Ion. 1,60, and thence continued at the same latitude to Ion. 115, where it 

 terminated.] 



