424 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 212. 



SEPTEMBER I2ih, Idj-l : EVENING. 



Lat. at ~h 30m., 22 15' N. : Lon. 115 4' E. 



Sun 8ft li/i. >//<. 

 Stronger and Diffuse I.i^lit ac 7A. 15'. aad "A. 45m. 



Clouds ever since last observation (September 4th j, until this evening: sky, to-night, very clear and brilliant. 

 The Zodiacal Light quite distinct. The ecliptic has got down to a low angle with the horizon ; and there was, this 

 evening, a slanting off of the Stronger Light, as in the line a a. in the chart. This Light oft" to d d, was, I think, 

 decidedly Zodiacal ; for there was no such Light along the horizon, on either side of '/ if, or c c ; it terminating 

 abruptly at both places, and at d by a sudden curve towards the horizon. While this Light between b b, and a a, 

 was strong enough to come within the name of the Stronger Light, that between a: x, and c c, was still stronger, and 

 I could distinctly see the old Stronger Light keeping along its old straight course a; a?; this new addition being 

 evidently an extraneous thing. Eeiug at sea, 1 bad a ele.ir open horizon; and the night, remarkably clear, was very 

 favorable lor observations. Of the Stronger Light, decidedly the brightest part was below the zigzag. 



At 8 h 45 m there was still a remnant of the Stronger Light ; but the bounds of both this and the Diffuse were now 

 too indistinct tii be made out reliably. 



