230 



OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 113. 



FEBRUARY 17ih, 1834: 



Lat. 35^ 19' N : L..II. I39=>43'E. 

 Suu set 5/i. 4U/. 



!7A. OCT. 

 ' 3 ' 

 9 



Clouds and rain last evening. The early part of this evening was perfectly clear, and very fine for observations. 

 Took boundaries at 7", and then watched to see whether there would be pulsations. Saw them, but they were not as 

 distinct as at the last observations of this kind ; yet, with close watching, they could be easily made out. They were 

 confined to the Stronger Light, which, at 7 o'clock, was at d. 



li. m. 



At 7 3, at c. 

 7 7, at d. 

 7 10, at 6. 

 7 12, at d. 



7 14, at a, and very dim. 

 7 15, at IT, and almost extinct. 

 7 17, at b, and brighter. 

 7 18J, has just reached c. 

 7 20, has just readied d. 

 7 21, has just reached b. 

 7 22-A, still at 6. 



h. m. 



At 7 24, at c. 

 7 25, at d. 

 7 2G, has got up to e, but not brighter than when 



at d. 



7 30, has got up to/. 

 7 35, still at /. 

 7 3'J, there seems to be a pulsating between d and/, 



and perhaps has been since 7 1 ' 31"', but I cannot 



speak with certainty. 



7 44, same as at 7 ' 3'J 1 ". 



8 0, clearly no pulsations evident to the senses. 



At S 11 and 9'', the northern boundary of the Diffuse Light was difficult to be made out ; it has now become so much 

 more dim than formerly. I sometimes doubted whether I ought to put these b mndaries down, they were so indefi- 

 nite ; but I have given them as, after careful consideration, they seemed to me to be. 



