282 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 141. 



APRIL 21et, 1854: EVENING. 



Lat. 34 40' N. : Lon. 138 59' E. 



Sun set 6/j. 32m. 

 ( 7/i. b'lrn. ) 



Stronger Light/ 9 V Diffuse, Sit., 9/t., and 10/.. 

 (10 ) 



A very clear night. At T h 40" 1 there was a whitish light distinguishable, extending np to Castor and Pollux ; at 

 I 7 h 52 ra I was able to get reliable boundaries, as in the chart. The sky was so remarkably favorable for observations 

 in every respect, that I looked out carefully for pulsations, but was not able to see any. Two or three times I 

 thought the Light faded a little ; but there was nothing reliable, and I concluded, finally, that there were no 

 pulsations. At 10 1 " the Light was still very distinct ; the Diffuse Light grows stronger as the night advances (to a 

 certain point), and at 10 h it is difficult to distinguish between it and the Stronger Light ; but I thought the bound- 

 aries of both were about the same as at 9 h . 



