346 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 173. 



JULY 1st, 1854: MORNING. 



Lat. at 3A., 27 35' N.: Lon. 136 8' E. 

 Sun rose 5A. 12m. 



C 2A. Om. ) 

 Stronger Light ? 3 } Diffuse 2A. 45m. 



( 3 30 ) 

 Sun's Lon. 99 15'. 



Rose at 2", and found the Zodiacal Light quite distinct; the sky brilliant, hut the view interrupted by flying 

 clouds towards the horizon ; in the intervals between these, I was able, however, to get reliable boundaries. The 

 D'ffuse Light, however, was so dim, that I could not get boundaries till 2" 45 m ; and even then, and afterwards, this 

 Light faded away so imperceptibly at its edges, that I had some doubts about trying to define it at all. The lower 

 end of the Stronger Light is always much brighter than the upper : it dims as it ascends ; and, at last, it is hard to 

 say where its apex is; but the lines got below, which are fully reliable, help, by their convergency, to guide us 

 along the less striking part above. Dawn about 3 h 40'". 



