OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 295. 



FEBRUARY 2 1st, 1855: EVENIKO. 



Lat. 53 33' S. : Lon. 70 53' \V. : Port Famine, Straits of Magellan. 



Sun set at Hi. 12 . 



Stronger and Diffuse Light at 9/i. anil 9/i. 30,n. 

 Zenith point at 9A., Lat. 74 25' K. : Lon, 13(i 3(1'. At 9A. Slim., Lat. 73 30' S. : Lon. 142 30'. 



Clouds last night. The sky this evening was perfectly clear, and very favorable for observations ; but the twilight in 

 now very long (lasting till near 9 o'clock), and the ecliptic has now got down so near the horizon, even at its highest 

 part, that it is very difficult to get boundaries of the Zodiacal Light that can be called reliable. Those of the Diffuse 

 Light I think may be depended on. For the Stronger Light, I cannot speak so confidently ; but it was easily 

 seen, at 9 o'clock, that the Stronger Light near the horizon, on the left of Saturn, was quite wanting on the right 

 of that planet,* and the difference could be ascribed only to the Zodiacal Light. Dr. - - happened to be near me 

 at the time, and readily saw this difference as well as myself. At 9" S" 1 it was better marked ; and at 9" 30 m , the 

 night having deepened, I thought the Stronger Light more decided and more easily defined than at 9 h , and I think 

 the boundary for that time may be considered reliable. 



The southern glare (ice-blink ?) this evening was very striking. 



Saturn had then a latitude oi about 1 20' S., and Lon. of about C8 30'. 



