514 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 257. 



DECEMBER 18th, 1854 : MORNING. 



Lat. at 3A., 33 58' N. : Lon. 120 26' W. 



Sun rose at ~/i.5m. 



Stronger and Diffuse Light at 2/i. 15m. and 3^. 30m. 

 Sun's Lon. 266 16'. 



Clouds yesterday ; also on Sunday. Sky this morning very clear and brilliant above ; a few clouds near the 

 horizon. Was on deck at 2 h 10'", and found the Zodiacal Light very distinct, with boundaries well defined. At 3" 

 30 m the Light was not as strong as at 2 h 15 m , and the outlines were not so well marked, although the sky was as clear 

 and the stars as brilliant as at the previous observation. I could not tell what caused the difference. The Diffuse 

 was seemingly as at 2 h 15 m : its upper end at neither time clearly defined. 



