652 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 276. 



JANUARY 9th, 1855: EVENING, 



Lat. 8 47' N. : Lon. 79 31' W. 



Sun set at 5h. 52m, 

 C 7/i. 20m. ) 



Stronger Light aU 8 > Diffuse at 7/t. 20m. and 8/;< Om, 

 ( 8 10 ) 



Clouds obscured the western sky till 7" 15 m : I was able, however, to notice that the effulgent Light under the 

 zigzag showed itself first at 7 h 13 m . Grot outlines at 7' 20"' ; but clouds still interfering, prevented ray having any 

 very satisfactory observations about pulsations, though I could see that there were such. My records say, " 7 h 43 

 exceeding bright : 7" 45 m dim : 7" 53 m very bright : 7" oo^" 1 has dimmed sensibly : 7" 57 brightening :" * * * 8 

 o'clock, now very bright. At S 1 ' 5 m the increased brightness at the upper part almost suddenly commenced ; the 

 effulgence below the zigzag still continuing, but not as bright as before." At 8 h 10" the southern or left-hand 

 boundary seemed to have suddenly extended to a a, as in the chart. At 8' 1 15 m the effulgence below the zigzag wag 

 gone. At 9 h the Zodiacal Light was still strongly marked, but gave no reliable boundaries ; so also at 9" 45'. 



