156 OBSERVATIONS ON T11E ZODIACAL LIGHT. 



No. 78. 



OCTOBER 31st, 1853 : EVENING. 



Lat. 22 23' N.: Lon 113" 32' E. 



Sun set alt. 20m. 



Stronger Light at 6h. 27m. Diffuse G.'i. 45w. 

 6 45 70 



70 80 



80 a 



9 

 10 30 



The atmosphere remarkably clear ; made careful observation. The twilight finally left a dead reddish horizon. 

 At G' 1 22 , this began to brighten and turn whitish, particularly under and e Draconis; 6 h 27-, it is now decidedly 

 the Zodiacal Light; G' 1 3CP, the Stronger Light (the only Light yet shown) has grown in strength very rapidly, and 

 is rapidly ascending; the Diffuse Light shows itself beyond the edge of the other; G' 1 37 m , there has been, from the 

 first, a patch of light (the same as last evening, and at the same place), stronger than the rest; but this is now gone, 

 and the Stronger Light is all equalized; for the rest, see the chart: ( J : ' 30'", presented the same appearance as 9 K . 

 The atmosphere being unusually transparent (stars of the 6th magnitude very bright), I determined to watch assidu- 

 ously till nothing more could be seen. At 10 h , the same as 9'' 30 m ; but the inclination of the ecliptic has greatly 

 changed since 7 o'clock, and the Light (all the Stronger Light now) has shot across the Milky Way, and shows 

 itself in great brightness beyond ; H)' 1 II)'", there was a change : the Light began to fade rapidly; 10 h 30'", some of it 

 left, but quite contracted in limits (see chart) ; 11 o'clock, perhaps a little left, but nothing reliable, and no bounda- 

 ries can be got; nothing certain any more, and I cease observing. 



