J26 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 163. 



JUNE 2d, 1854: MORNWB. 



Lat. 41 47' N.: Lon. 140 43' E. 

 Sun rose 4A. 3l^m. 



Stronger Light at ' 3,' Diffuse at 3A. 

 Zenith point at 2A. 3u/.: Lat. 63 10' N.: Lon. 303 



Fogs or clouds since the 30th ultimo. Was on deck this morning at l h 50", and found the slcy very clear, and the 

 Zodiacal Light distinct, though dim. At 2" got boundaries, as in the chart ; the lower boundary of the Diffuse, how- 

 ever, not fully reliable, but given as it appeared to be. At 2'' 30'" the Light had increased considerably in bright- 

 ness, especially at its lower end, and up to the boundary a a. At 2" 1 3S 11 still brighter, and the greatest brightness up 

 to the boundary l> b. At 2" 50'" a general whiteness in the sky, and could not get boundaries any longer. 



At 2 h the boundary of the Stronger Light, on the lower side, could be made out to c; at 2" 30' it had extended to d. 



