152 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 76. 



OCTOBER 29th, 1853: EVENING. 



Lat. 22 23' N. : Lou. 113 32' E. 



Sun set 5/i. 21Jm. 



Stronger Light at Sh. 20m. Diffuse G/i. oOw. 

 6 30 70 



70 8 45 



8 41 



Early part of the evening very clear, and made very careful and minute observations as follows : Sun set, by 

 watch, 5" 22 m ; 6 h 13 m , western sky one uniform, dead reddish color; 6" 20" 1 , sky lias become whitened first below, 

 then the white ascending till it has the outline in the chart at that hour; 6 h 23 m , this whiteness, as if the lull moon 

 were at /3 Libras and going to rise ; 6 h 25 nl , it is now decidedly the Zodiacal Light (the Stronger Light), its limits the 

 same as at 6 h 20'"; it is stronger and more decided towards Antares than at 6" 20 m : 6" 27 m , the Diffuse Light now spreading 

 out from the other, and ascending; 6" 30 m , there has been all along from 6" 20 m , a patch of light stronger than the 

 rest, as marked in the chart by the zigzag lines; 6" 33 m , this patch scarcely seen (perhaps in consequence of being 

 lower toward the horizon); 6"45' n , the Stronger Light about 13 Bootis equal to that of the Milky Way between Alberio and 

 39 Cygni. Now, clouds stop observations; 7 o'clock, the clouds have shifted, and allow observations on the left; the 

 Stronger Light shows itself decidedly above the Milky Way; 8" 45 m , it is now pretty strong there; 9 h 30', the Zodi- 

 acal Light seems still to show itself above the Milky Way, but it is difficult to distinguish it from the general white- 

 ness of the horizon. 



