2 OBSERVATIONS ON THE ZODIACAL LIGHT. 



fit was my intention to have this series of published charts commence in June, 1853; l>ut thu singular sliding over of the Zodiacal Light, bodily, 

 as the night advanced, and also its great inclination to the ecliptic, as shown in these observations in April, have induced me to take them from the 

 rejected matter, and to give them insertion. The whole of May (being at the change of monsoons) was cloudy, and did not give me a single reli- 

 able observation. 



From June 7th, the series goes on in unbroken order until our arrival at home.] 



No. 1. 



APRIL 2d, 1853 : EVENING. 



Latitude 10 32' N.: Longitude 110 3 9' E. 

 Sun set Gh. l^m. 



Stronger Light j J * jj" 1 ' I Diffuse Light probably* at 6k. 48m. 



It is beginning to be difficult to get the northern boundary of the Diffuse Light, in consequence of its being so near 

 the Milky Way. It is, however, I believe, correctly given in the chart. The horizon is now hazy almost every 

 evening, and the Zodiacal Light cannot be made out for four or five degrees above its line. 



In the early part of the evening, the boundary of the Stronger Light was as marked in the chart at a a. When 

 I went out again, at I 7 h 15 m , the light appeared to have changed, bodily, over to the left, and was, as far as I could 

 judge, after careful observation, at the boundary b b; by ^ 50 m it seemed to have again changed, and it now appeared 

 to be bounded by thu line c c. I never before noticed any changes of this character. 



a The exact time not noted in my records. 



