428 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 214. 



SEPTEMBER 14th, 1854: EVENISO. 



Lat. at n, 30m. , 24 5' N. i Lon. 118 4K E, 



Sun set at 6A. 2m. 

 ronger and Diffuse Light at 7h, 20i. and ?A. 5flm, 



1 am inclined to think that the adjunct Light to b b and a a is only a reflection from the atmosphere ; yet there 

 are some things about it antagonistic to this idea. I watched this evening, so as to observe it carefully from the 

 first. After sunset, there was a reddish horizon light (evidently twilight), yet extending only from c to d (see 

 chart on the horizon of 7 h 20 m ), and terminating somewhat abruptly at those points. As- the evening grew on, this 

 redness gave place to a whitish light, keeping the same extent on the horizon, but increasing in breadth, till at 

 7' 1 20'" it had the boundaries b b, as in the chart, being double the width of the first reddish light. But this 

 increase in width may have been owing to the increasing darkness of the sky, making positive light more obvious. 

 The Zodiacal Light, strictly so, was distinct at 7 h 10 m 3 but did not give boundaries till Y 1 ' 20'". Looked for pulsa- 

 tions, but could not see any. 



