5<M OBSERVATIONS OH THE ZODIACAL LIGHT. 



No. 297. 



FEBRUARY 23d, 1855 : MORNIKO. 



Lat. at 2*. 30m., 5-2 28' S. : Lon. 67 29' W. 



Sun rose at 5A. 21m. 

 Stronger and Diffuse Light at 2fi. 30m. 



Was on deck at 2 h 20 ra , and found the sky perfectly clear and stars very bright, and had a very satisfactory 

 observation. The Stronger Light was very well marked below the Milky Way, and sufficiently so above ; while, at 

 this early hour, the effulgence up to the zigzag x x was very great. I could not see any Diffuse Light on the left ; 

 and on the right, or upper side, it was not very distinct. At 2 h 45 m the light began to stretch slowly along the 

 horizon on the right, showing the first beginning of dawn. At 2" 48 m the effulgence noticed as to x x suddenly sunk 

 to y y, and was greatly dimmed. The suddenness of the change was remarkable. The Light was now grey, 

 having lost its warm yellowish tinge. At 2" 52' dawn had fully come. 



The boundaries of the Stronger Light given in the chart for this morning may be considered fully reliable. The 

 atmosphere was so clear, even down to the water, that stars were seen immediately on emerging from the horizon. 

 I thought, several times, that there were pulsations, but I could not be certain about them. 



